英语科普文章(科普类英语文章)
本文目录
- 科普类英语文章
- 英语科普类文章有哪些
- 求一篇一百字左右的英语科普文,越简单越好,是科普类型就好,初中、小学水平都可以,及翻译
- 英语天文科普文
- 英语科普类文章
- 英语科普文章翻译
- 求英语科普类文章(附中文)
- 医学英语科普文章
- 科普文章英语怎么说
- 科普英语小作文
科普类英语文章
随着科学技术的飞速发展和全球化进程的不断加快,科普 文章 在向社会大众普及科学技术知识,提高公众科学素养等方面发挥着举足轻重的作用。下面是我带来的科普类英语文章,欢迎阅读!
科普类英语文章
生物与环境平衡的危机
The history of life on earth has been a history of interaction between living things and their surroundings. To a large extent, the physical form and the habits of the earth’s vegetation and its animal life have been molded by the environment. Considering the whole span of earthly time, the opposite effect, in which life actually modifies its surroundings, has been relatively slight. Only in the present century has one species man acquired significant power to alter the nature of his world.
During the past quarter century this power has not only become increasingly great but it has changed in character. The most alarming of all man’s assaults upon the environment is the contamination of air, earth, rivers, and sea with dangerous and even lethal materials. This pollution is for the most part irrecoverable. In this now universal contamination of the environment, chemicals are the sinister partners of radiation in changing the very nature of the world the very nature of its life. Chemicals sprayed on croplands or forests or gardens lie long in soil, entering into living organisms, passing from one to another in a chain of poisoning and death. Or they pass mysteriously by underground streams until they emerge and combine into new forms that kill vegetation, sicken cattle, and work unknown harm on those who drink from once pure wells. "Man can hardly even recognize the devils of his own creation," as a scientist has said.
It took hundreds of millions of years to produce the life that now inhabits the earth. Given time not in years but in millennia life adjusts, and a balance has been reached. But in the modern world there is no time.
The rapidity of change follows the impetuous pace of man rather than the deliberate pace of nature. Radiation is now the unnatural creation of man’s tampering with the atom. The chemicals are the synthetic5 creations of man’s inventive mind, having no counterparts in nature.
To adjust to these chemicals would require not merely the years of a man’s life but the life of generations. And even this, were it by some miracle possible, would be futile, for the new chemicals come from our laboratories in an endless stream; almost five hundred annually find their way into actual use in the United States alone. Among them are many that are used in man’s war against nature. Since the mid 1940’s over 200 basic chemicals have been created for use in killing insects, weeds, and other organisms described as "pests."
It is not my contention that chemical insecticides must never be used. I do contend that we have put poisonous and biologically potent chemicals indiscriminately into the hands of persons largely or wholly ignorant of their potentials for harm. We have subjected enormous numbers of people to contact with these poisons, without their consent and often without their knowledge. I contend, furthermore, that we have allowed these chemicals to be used with little or no advance investigation of their effect on soil, water, wildlife, and man himself. Future generations are unlikely to forgive our lack of concern for the integrity of the natural world that supports all life.
地球上生命的历史一直就是一部生物与其环境相互作用的历史。在很大程度上,地球上动植物的形态以及习性都是由外部环境所塑造的。考虑到地球上生命存在的整个时间,相反作用,即生命对其周围环境的实际改变作用,却相对很小。只有在当前这个世纪(指20世纪)才有一个物种--人类,获得了强大的力量,改变了其所生存的世界的自然状态。
在过去的1/4世纪中,这种力量不仅日趋强大,而且其性质也发生了变化。在人类破坏环境的种种行为中,最令人担忧的是人类向大气、土壤、河流以及海洋中排放危险甚至致命物质,而当今这种污染在很大程度上是无法挽救的。在当今这种对环境的普遍污染中,化学制品与辐射狼狈为奸,改变着地球的自然状态,也就是改变着地球上生命的自然状态。喷洒到农田、森林或者花园里的化学物质长期滞留于土壤中,渗入有机体内,并彼此相传,形成了一个中毒与死亡的链条。化学物质还神秘地通过地下水传递,最终以新的形式出现并结合,使植物毒死,牲畜害病,并使饮用一度纯净的井水的人遭受了不明之害。正如一位科学家所言:“人类甚至对自己创造的恶魔都不认识。”
地球历经了许多亿年才创造了栖息其上的生命。经过了一定时间--不是以若干年计而是以若干千年计的时间--生命开始适应环境,并形成了一种与环境的平衡。但是在现代世界中,时间这一因素已经没有了。
环境改变的速度不再顺从大自然从容不迫的节奏,而是顺从人类急切匆匆的步伐。辐射是当今人类通过支配原子而得到的一种非自然的创造物。化学制品则是人类有发明创造力的头脑创造出来的合成物,在自然界本无相应的东西。
为了适应这些化学制品,人类需要付出的时间不会只是一个人一生的时间,而是几代人的时间。而即使这样,就算出现奇迹成为可能,这种适应也是徒劳的,因为新的化学制品从我们的实验室中源源不断地涌出。仅在美国,每年就有大约500种化学制品投入使用,其中许多是用于人类对自然的战争中。从20世纪40年代中期起,人类已经创造了200多种基本化学制品用来消灭昆虫、野草以及其他所谓的“有害生物”。
我不是说人类决不能使用化学杀虫剂。我要说的是,我们不分青红皂白地将这些有毒的、具有强大生物功能的化学制品,交给了那些对这些制品的潜在危害基本上或者完全无知的人去使用。我们使众多的人接触这些有毒物质,却没有征得他们的同意,并常常将他们蒙在鼓中。我还要说的一点是,我们允许使用这些化学制品,却事先很少或者根本没有调查它们对土壤、水、野生生物以及人类自身造成的影响。我们缺乏对万物赖以生存的自然界生态统一的关心,对此,我们的后代是不可能原谅的。
科普类英语文章
基因技术能否使人更聪明?Get Smart
Many people dream of having a smarter brain. Princeton neurobiologist Joseph Z. Tsien found the key. In September he announced that he’d built a better mouse by altering a gene that affects learning and memory. A similar process of gene manipulation might conceivably be used one day to boost intelligence in humans.
The secret lies in a feature of brain cells called the nmda receptor, which Tsien likens the flow of information. When the window is open, chemicals called neurotransmitters flow through easily and memory is registered and stored. But as organisms mature, the window begins to close. (This may explain why children lose their facility for learning new languages when they reach sexual maturity and why some people suffer memory loss as they age.)
Tsien noticed that the receptor worked more efficiently when teamed his mice against common mice, they won paws down. Ordinary mice could recognize a Lego block for 12 hours, but smart mice could remember the block for up to three days. "That’s a profound enhancement," Tsien says.
Can it be done with humans? Maybe, but genetic engineering will have to make some extraordinary advances first. And some thorny ethical issues will have to be resolved. Meanwhile, Tsien promises to keep his furry little geniuses locked up in a lab, far from your larder. "Otherwise," he says, "you might need a smart cat or a smart mousetrap to catch them."
许多人都希望自己能变成更聪明。普林斯顿神经生物学家Joseph Z. Tsien就找到了这把开启智慧之门的钥匙:他于九月宣布,通过改变影响学习和记忆能力的基因培养出了一只聪明的老鼠。类似的基因处理技术有望在未来日子里运用到人脑,以推动人类智慧的飞跃。
该技术的奥秘就在于名为nmda感受器的脑细胞的功能。Tsien将其比作一个传递信息流的圆柱通道或窗口。当窗口开放时,某种称为神经传递素的化学物质就能轻易流过,记忆因此登记并存储了下来。然而,当器官成熟时,这扇窗口就开始关闭。(这也能解释为何 儿童 长大后(性器官成熟之时)会失去掌握新语言的能力,以及为何某些人年老时会患失忆)。
Tsien注意到,当感受器与名为NR2B的基因协作时效率会更高。因此,他将NR2B基因植入一批老鼠的受精卵中。一只普通老鼠的记忆之窗仅开放千分之150秒。而经Tsien植入基因的老鼠,记忆之窗能开放千分之250秒,这已经能够使其 记忆力 发生惊人的改变。当他让自己的老鼠与普通老鼠互斗时,它们竟能轻而易举地取胜。普通老鼠能够保留关于Lego block的记忆12小时,而聪明的老鼠居然能将记忆保持三天。“这可是一个意义深远的进步。”Tsien这样说。
那么,人类也能接受这种基因移植吗? 或许可以,但前提是基因工程得首先做出非凡的成就,还必须解决一系列棘手的伦理问题。Tsien保证他一定会将那些披着毛皮的小天才锁入实验室,远离人们的食品柜。“否则,”他说,“为了捉住他们,人们就不得不去寻找更聪明的猫或者功能更强的捕鼠器了。”
科普类英语文章
食用转基因食品安全吗?Food Safe To Eat?
Traditional plant breeding involve s crossing varieties of the same species in ways they could cross naturally.For example,disease-resistant varieties of wheat have been crossed with high-yield wheat to combine these properties.This type of natural gene exchange is safe and fairly predictable.
Genetic engineering(GE)involves exchanging genes between unrelated species that cannot naturally exchange genes with each other.GE can involve the exchange of genes between vastly different species――e.g.putting scorpion toxin genes into maize or fish antifreeze genes into tomatoes.It is possible that a scorpion toxin gene,even when it is in maize DNA,will still get the organism to produce scorpion toxin――but what other effects may it have in this alien environment?We are already seeing this problem――adding human growth hormone genes to pigs certainly makes them grow――but it also gives them arthritis and makes them cross-eyed,which was entirely unpredictable.
It will be obvious,for example,that the gene for human intelligence will not have the same effect if inserted into cabbage DNA as it had in human DNA――but what side-effect would it have?In other words,is GM food safe to eat?The answer is that nobody knows because long-term tests have not been carried out.
Companies wanting a GM product approved in the UK or USA are required to provide regulatory bodies with results of their own safety tests.Monsanto’s soya beans were apparently fed to fish for10weeks before being approved.There was no requirement for independent testing,for long-term testing,for testing on humans or testing for specific dangers to children or allergic people.
The current position of the UK Government is that“ There is no evidence of long-term dangers from GM foods.”In the US,the American Food and Drug Administration is currently being prosecuted for covering up research that suggested possible risks from GM foods.
传统的植物培育 方法 ,是依照植物自然杂交的方式,进行相同物种的人工杂交。比如,抗病小麦同高产小麦杂交,形成了一种具有双重特性的新的小麦品种。这种自然的基因交换既安全,又具有相当的可预见性。
基因工程是在彼此毫无关系的物种之间,相互交换在自然条件下无法交换的基因。它可在有巨大差异的物种之间进行基因交换。比如,将蝎子毒素基因注入玉米,或者将鱼防冻基因注入西红柿。即使在玉米DNA中,蝎子毒素基因依然可能获得有机组织产生蝎子毒素。但是在这种异质的环境中,这种基因产品会有什么其他作用吗?我们实际上已经发现这个问题:将人类生长荷尔蒙基因植入猪的体内,一定会使猪的生长加速,但是同时也使猪患上了关节炎和内斜视,而这一切是完全无法预测的。
打个比方,人类的智力基因显而易见在人体DNA内和注入卷心菜DNA后的作用是不同的。但将它植入卷心菜中会产生什么样的副作用呢?换句话说,食用转基因食品安全吗?没有人知道答案,因为人们尚未进行长期的测试。
在英国或者美国,一个公司如果希望其转基因产品获得批准,它必须向管理机构提供本公司转基因产品安全测试的结果。Monsanto的大豆在获得批准之前,曾用了10周时间进行喂鱼试验。目前,尚无要求对转基因产品进行独立测试、长期测试、人体测试,或者就其对儿童及过敏者所造成的特定危险进行测试。
英国政府目前的态度是:“尚无证据表明食用转基因食品存在长期性的危险。”在美国,人们正在起诉美国食品药品管理局掩盖转基因食品安全性的研究结果,这些研究结果表明,食用转基因食品可能导致危险。
英语科普类文章有哪些
1、To Pull up the Seedlings to Help Them Grow “拔苗助长”
Once upon a time, there was an old farmer who planted a plot of rice. After he planted the seedlings, every day he went to the field to watch the seedlings grow. He saw the young shoots break through the soil and grow taller each day, but still, he thought they were growing too slowly. Eventually he got impatient with the young plants and suddenly he hit upon an idea that one by one, he pulled up the young plants by half an inch. The next early morning, the young man couldn’t wait to check his “achievement”, but he was heart-broken to see all the pulled-up young plants dying.
从前,有个农夫,种了稻苗(seedlings)后,便希望能早早收成。每天他到稻田时,都发觉那些稻苗长得非常慢。他等得很不耐烦。想了又想,他终于想到一个“最佳方法”,他将稻苗全都拔高了几分。第二天,一早起身,他迫不及待地去稻田看他的“成果”。 哪知,却看到所有的稻苗都枯萎了。
2、Plugging One’s Ears While Stealing a Bell “掩耳盗铃”
Once upon a time, there was a man who wanted to steal his neighbor’s doorbell. However, he knew clearly that the bell would ring and catch the other people’s attention as long as he touched the bell. So he thought hard and suddenly hit on a clever “idea”. He plugged his ears with something, thinking that everything would go well when he stole the bell. Unfortunately to his disappointment, the bell still rang loudly and he was caught on the spot as a thief.
从前,有一个人想偷邻居门上的铃,但是他知道一碰到铃,铃就会响起来,被人发现。他想啊想,终于他想出一个“妙极”,他把自己的耳朵用东西塞起来,就听不见铃声了。但是当他去偷铃时,铃声仍旧响起来,他被别人当场抓住。
3、The Fox and the Crow “狐狸和乌鸦”
One day a crow stood on a branch near his nest and felt very happy with the meat in his mouth. At that time, a fox saw the crow with the meat, so he swallowed and eagerly thought of a plan to get the meat. However, whatever the fox said to the crow, the crow just kept silent. Until the fox thought highly of the crow’s beautiful voice, the crow felt flattered and opened his mouth to sing. As soon as the meat fell down to the ground, the fox took the meat and went into his hole.
有一天,一只乌鸦站在窝旁的树枝上嘴里叼着一片肉,心里非常高兴。这时候,一只狐狸看见了乌鸦,馋得直流口水,非常想得到那片肉。但是,无论狐狸说什么,乌鸦就是不理睬狐狸。最后,狐狸赞美乌鸦的嗓音最优美,并要求乌鸦唱几句让他欣赏欣赏。乌鸦听了狐狸赞美的话,得意极了,就唱起歌来。没想到,肉一掉下来,狐狸就叼起肉,钻回了洞。
求一篇一百字左右的英语科普文,越简单越好,是科普类型就好,初中、小学水平都可以,及翻译
PUBLIC ATTITUDES TOWARD SCIENCEAnyway, even if one wanted to, one couldn’t put the clock back to an earlier age. Knowledge and techniques can’t just be forgotten. Nor can one prevent further advances in the future. Even if all government money for research were cut off (and the present government is doing its best), the force of competition would still bring about advances in technology. Moreover, one cannot stop inquiring minds from thinking about basic science, whether or not they are paid for it. The only way to prevent further developments would be a global state that suppressed anything new, and human initiative and inventiveness are such that even this wouldn’t succeed. All it would do is slow down the rate of change.
英语天文科普文
帮您找了两篇有关天文的科普文,希望对您有所帮助:Black Holes(黑洞)Black holes are some of the strangest things in space. A black hole sucks in anything that gets near it. Nothing can escape from a black hole—not even light.BLACK HOLES ARE STRONGNothing escapes from a black hole because its gravity is so strong. Gravity is a force that pulls one thing to another. Gravity is the force that holds you down on Earth. When you jump up, Earth’s gravity pulls you right back down. Earth’s gravity also makes the Moon orbit (go around) Earth.The more matter (stuff) that is packed in a star, planet, moon, or other object, the stronger is its gravity. Gravity makes an object with more matter pull an object with less matter toward it. The Sun has a lot more matter than Earth. The Sun’s gravity pulls on Earth. It makes Earth orbit the Sun.Matter is packed very tightly in some things and loosely in others. The matter that makes up an iron ball is packed much tighter than the matter that makes up a bag of feathers. A scientist would say that an iron ball is much denser than a bag of feathers.A black hole is denser than anything you could imagine. A black hole could have a million times more stuff than our Sun. All of this stuff would be packed into an area smaller than a city. The force of gravity from so much stuff packed into such a small area is awesome.WHERE DO BLACK HOLES COME FROM?Astronomers and physicists think black holes come from dying stars. A dying star burns out and stops shining. All the stuff that makes up the star starts falling in on itself. The star gets denser and denser. If the star is big enough and has enough matter, it could get dense enough to become a black hole.STUDYING BLACK HOLESNo one has really seen a black hole. You cannot see black holes because they do not give off any kind of light. Physicists used math to predict that black holes exist.Astronomers look for signs of black holes. Astronomers study powerful rays coming from stars in deep space. The stars seem to be orbiting black holes. Astronomers think that black holes are sucking gas from the stars, and this makes the stars give off X rays.Galaxies are enormous groups of stars. Astronomers think that most galaxies have huge black holes at their centers. The Hubble Space Telescope took pictures of a disk of hot gases at the center of our own Milky Way Galaxy. Astronomers think this disk is going around an enormous black hole right in the center of our galaxy.Big Bang(宇宙大爆炸)The universe contains everything that exists: Earth, the Sun, the stars, galaxies (collections of billions of stars), and everything else in space. People have wondered how the universe got started for thousands of years. Most scientists now think they have the answer. They think the universe began about 14 billion years ago with a kind of big explosion. They call the explosion the big bang.WHAT HAPPENED AFTER THE BIG BANG?No one knows what caused the big bang, but scientists think they know what happened all the way back to the first seconds after the big bang.The brand new universe was very hot and very small. It blew outwards very fast. In the first three minutes, matter started to form. Hundreds of years later, the universe looked like a big ball of fire.You can picture the universe as something like a black balloon with white dots painted on it. The black represents space and the white dots are galaxies. Blowing air into the balloon makes it bigger. The spaces between each dot get farther apart as the balloon expands.As it got bigger, the universe got cooler. Hydrogen gas formed. The gas broke into clumps. The clumps came together to make galaxies and stars. Other kinds of matter formed in the stars. Finally, planets like Earth formed around some stars.IS THERE PROOF OF A BIG BANG?The expansion of the universe is evidence for the big bang. American scientist Edwin Hubble studied light coming from galaxies far out in the universe. In 1929, he found that the galaxies were speeding away from Earth and from each other in all directions. Scientists tracked the paths of the galaxies back to their starting place. They saw that all the galaxies must have started from the same place. Packing all that matter into a small area would make a very dense, searing hot ball—the big bang.Scientists use math to describe how the universe behaves. In the early 1900s, German American scientist Albert Einstein came up with equations that predict an expanding universe. These equations have correctly predicted the motions of stars, planets, and light. More proof came in the 1990s from a spacecraft called the Cosmic Background Explorer (COBE). COBE saw rays coming from far off in the universe. The rays are left over from the early days of the universe. They could only have been created in a much smaller and hotter universe long ago.WILL THE UNIVERSE KEEP EXPANDING?Scientists are not sure what will happen to the universe. They currently think it will keep expanding forever. They even think the expansion is speeding up. But scientists are still studying this question.
英语科普类文章
科普 教育 对我国小康社会、和谐社会的建设有着重要的意义。下面是我带来的英语科普类 文章 ,欢迎阅读!
英语科普类文章1
听点小音乐 轻松学分数
Stuck on a tricky math problem? Start clapping. Grade school kids who learned about fractions through a rhythm-and-music-based curriculum outperformed their peers in traditional math classes. The work is inEducational Studies in Mathematics.
被一条数学题难住了?拍拍手试试吧。研究表明,小学生在有节奏感的音乐背景下学习分数知识的效果会好于传统课堂(具体研究发表在《数学教育研究》上的《学术性音乐:如何用音乐辅助三年级小学生学习基础分数》一文,作者:苏珊·科瑞等)。
Fractions let you divide up a measure of music into notes of varying length. For example, one four-beat measure could contain a single whole note held for all four beats, two half notes of two beats apiece, four quarter notes of a beat each, and so on. In the Academic Music program, based on the Kodaly method of musical education, students clap, drum and chant to memorize the lengths of musical notes—then solve problems in which fractional notes must add up to a full measure of music.
根据分数的概念,一节音乐可分成长短不一的几串音符。例如,一节四拍子的调子可包含一个代表四拍子的全音符,两个各代表一个二拍子的二分音符,四个各代表一个一拍子的四分音符……以此类推。在“学术性音乐”项目中,研究人员以科达伊的音乐教育 方法 为基础,让学生通过打拍子、敲鼓、合唱记住各音符的长度,学生必须把这些片段加起来,才能得到一节完整的音乐——如此实践可解决学生对分数的疑惑。
Sixty-seven students participated in the study. Half did math problems using the Academic Music system. And after six weeks, the students in the music program averaged 50 percent higher on tests than did the kids in regular math class. Fractions create a solid foundation for further math education—so mastering them is music to educators’ ears.
有67名学生作为实验对象参与了本次研究,其中有一半在“学术性音乐”体系下解决数学问题。六周后,他们在测试中的得分要比普通班级中的学生平均高50%。分数是进一步进行数学知识教学的基础——如此看来,这还多亏了教育者的耳朵。
英语科普类文章3
十万年前的颜料工作室
Archeologists have discovered a paint production studio in an ancient South African cave A new archaeological find may signify one of the great leaps in human cultural and cognitive history. Because researchers have discovered a 100,000-year-old art studio. It was known that ochre—rock with red or yellow pigments—was used for paint even that far back in history. But there was scant evidence for how it was prepared and handled. Then, in 2008, researchers uncovered an ochre mixing kit in a South African cave. They found two abalone shells, most likely used for paint mixing and storage. They also found ochre, bone, charcoal, grindstones and hammerstones. The researchers say the ochre was probably rubbed on quartzite slabs to create a fine powder. It was then mixed and heated with other crushed substances, including other stones or mammal-bone. Microscopic striations on the inner abalone surface likely are likely scrape marks left during paint mixing. The research was published in the journal Science. The paint may have been used for body adornment or for long-gone artwork. And the presence of this paint-production laboratory indicates that the early humans knew basic chemistry and could plan for the future.
考古学家在南非的一个古老洞穴中发现了一个油漆制作工作室。这个新的考古发现可能是人类 文化 和认知历史的最伟大的跨越之一。因为研究人员发现的这个工作室产生于十万年前。众所周知,拥有红色或黄色色素的赭石岩一直被广泛运用于绘画中,但却少有证据显示它是如何制作并运用的。2008年,研究人员 在南非的山洞中发现了赭石混合工具, 两个可能用于调漆和储存的鲍鱼壳,除此之外他们还发现了赭石,骨头,炭笔和石锤。研究人员称,这些赭石很有可能经过在石英岩板上仔细研磨后,得到上等的粉末,然后再与 其他石头或者是哺乳动物的粉末混合并加热。用显微镜观察鲍鱼壳的内表面,你可以发现一些刮痕,这些都有可能是在混合颜料的过程中留下来的。这个发现已经被刊登在科学期刊上。这些颜料可能一直被运用在人体 彩绘 和长久失传的艺术品上。而且这些颜料制作工作室的存在表明了早期人类对化学已有了基本的了解并具有了规划未来的能力。颜料工具的一小步,人类历史的一大步——辛西亚莫。
英语科普类文章3
你知道发烧的妙处吗?
Fever can play a variety of roles, such as inhibiting pathogen replication. It also apparently increases the population of killer T cells of the immune system. Christopher Intagliata reports.
发烧有多种不同的作用,如抑制病菌复制。它还可以显著增加免疫系统中杀伤性T细胞的数量。
I’ve always thought that when I get a fever, it’s my body trying to make things uncomfortable for the invading pathogen. And that’s often true—higher temperatures can inhibit the bad guys’ ability to replicate. But my fever may actually be a one-two-punch. In addition to slowing down the invader, the heat helps the immune system recruit more troops for a counter-attack. That finding appears in the Journal of Leukocyte Biology.
我很早就知道,发烧的时候,其实是我的身体正在对入侵的病原体做出抵抗。这是事实---高温可以抑制坏病菌复制的能力。但发烧更是一个组合打击。除了减缓病原体的入侵,高温可以帮助免疫系统召集更多的部队做出抵抗。这一研究发表在《白细胞生物学杂志》。
Researchers warmed up one group of mice to body temperatures of about 103 degrees Fahrenheit. They left another group at normal core temperature—about the same as ours. Then they injected both groups of mice with an antigen, a substance that attracts the attention of the immune system.
研究人员将一组老鼠的体温升高到103华氏度,另外一组保持正常体温---大约是人体温度。然后向这两组老鼠的体内注射抗原——一种会引起免疫系统反应的物质。
Blood samples taken three days later revealed that the feverish mice had nearly twice as many killer T-cells: the kind of immune cells that can hunt down infected cells or tumor cells, and slaughter them.
三天后,这两组老鼠的血样表明,体温较高老鼠组体内的杀伤性T细胞是正常组的2倍,这种免疫细胞可以追踪感染细胞或癌细胞,并将其消灭。
So when you’re sick and you get the chills, the authors say, your body may be trying to tell you to hop under some blankets. Lie down, warm up and send a message. The heat is on.
所以,当你生病或感到寒冷时,表示你的身体正直向你传达信息--裹条毯子。躺在床上吧,热起来,身体自会做出反应。热度来袭啊。
英语科普文章翻译
Scientistsdiscoveredthat"junkDNA,"thebasepairsbetweenknowngenesinthehumangeneticstructure,playanimportantrole.SeveralresearchteamshavefoundthatDNAbetweengeneshelpsdeterminehowvigorouslyandoftenthegenesareactivatedandshapesthecodingforproteinproduction.:科学家发现了"垃圾DNA,"在人类的遗传基因的结构已知的基因之间的恶劣双,扮演重要角色。一些研究队已经发现DNA在基因帮助决定之间如何精力充沛地和时常基因被刺激而且为蛋白质的生产塑造那个编码。
求英语科普类文章(附中文)
Are the sun and the solar system to the sun as the center, dominated by its gravity and the objects around it sports posed by the system . Members include the sun, Mercury, Venus, Earth, Mars, Saturn, Jupiter, Uranus, Neptune, Ming Wang, more than 2000 asteroids 34 satellites, as well as a lot of comets and meteoroids. The sun (Sun) The center of the solar system objects. Are a star. Contains nearly 98% of the solar system quality. With the Earth’s average Distance of 149,600,000 kilometers diameter 1,390,000 kilometers, to the Earth 109 times the volume of the Earth’s 1.3 million times, Ping Are the density of 1.4 grams / cubic centimeter. Surface temperature of about 6000 degrees Celsius, the center temperature of 15 million degrees Celsius. By Nuclear fission of hydrogen nuclei into helium thermonuclear reaction a large amount of energy. The naked eye we see the surface layer called the "light ball" , Light balls above a layer called the "chromosphere", the most outer layer called the "corona", which formed the sun’s atmosphere. Too Yang’s rotation period is 25 days, the bipolar area is about 35 days, the sun on the most abundant chemical element hydrogen. The sun’s activity stems from its central part. The sun’s core pressure of more than 34 billion times the Earth. Here at hair Health of nuclear fusion. Fusion led to the four proton or a hydrogen atom or helium nuclei阿尔法粒子. Al Law on the quality of particles smaller than 0.7 percent to four protons, the quality of the remaining energy is transformed into the sun and was released to the table Noodles, and through the process of emitting light and heat convection. Solar core, through millions of years of energy required to reach Its surface. Per second have been 700 million tons of hydrogen into helium. In the process, there are about five million tons of net energy Volume was released, so the sun can make light-emitting. Photosphere are the chromosphere above. Amount of solar power through the region from the center outward transfer. This layer can be seen too Yang flares. Flares sunspots are formed before the chromosphere the hydrogen generated by hot clouds. Photosphere at some Region, a slightly lower temperature than the surrounding (usually 4000 degrees Celsius), this is the sunspot. The sun’s outer atmosphere called the corona. Date the region has bait. Date baits are the upper chromosphere at the enormous Flame. The most coronal extension of outer space-oriented and radiation generated by the particles from the sun. Coronal only have the whole day Can be seen when fresh. The sun’s age of about 46 million years, it can continue to burn about 50 million years. At the final stage of its existence, too Yang will be in the helium into heavy elements, the sun will also be the beginning of the volume continues to expand, until the Earth swallowed. At 一亿年After the red giant stage, the sun will suddenly collapse into a white dwarf - all stars of the existence The final stage. Go through several万亿年, it will eventually completely cooled. Mercury (Mercury) Ancient China, also known as "辰星." The sun, one of the nine planets. From the sun recently. With solar distance 0.39 Astronomical units, that is 57.91 million kilometers in diameter for 38% of the Earth, mass of the Earth’s 5.5%, density of water 5.4 times larger orbit eccentricity, 0.21. Revolution period of 88 days, the rotation period of 59 days. For The sun side of the temperature of 400 degrees Celsius, while the sun back to -160 degrees Celsius, Mercury has many craters on And has a strong magnetic field, the surface strength of 1% of the Earth. Shell by the porous soil, or similar surface soil of the moon rock Composed of stone powder. Mercury is even lower than Jupiter’s satellite Ganymede (Ganymede) and Saturn’s satellite Titan (soil Titan) is also small. Mercury surface similar to the lunar surface. Meteorite dust covered the ups and downs撞成hills, a few kilometers of the fault cliff high Stretching hundreds of kilometers, large and small craters are everywhere. Looks at the sun than the Earth on large two and a half times. Because of not enough air to scatter sunlight, the sky is usually dark. If you look up to the sky, he also Xu will find two bright stars: a bright yellow are the Venus, the other one is blue earth. On observations from the Earth, Mercury and the sun angle of the largest only 28 degrees at dawn or during the day it appeared in the sky , So its observation very difficult. In the "sailors" on the 10th visit the Mercury before the awareness of Mercury are Very small. Because of its revolution and rotation of the relationship between the more complex, if the sun to rise from the sun for a Down Units to calculate, on the day of Mercury will be the day the Earth 176. Mercury appears that it can not exist on the water, its atmosphere is very small, and very high temperatures during the day. However, in 1991 Mercury at the Arctic scientists found an unusual bright spot. Highlights the possible cause of this are at the surface Or underground ice. Because the orbit of Mercury is rather special, at its North Pole, the sun is always on the horizon only irresolute Further. At some of the internal crater may never see the sun because of the temperature dropped to -161 degrees Celsius . Such a low temperature is likely to solidification from the planetary internal release of gas, or accumulation of ice from space . Mercury atmospheric pitiful, its main components for helium (42%), Sodium vapor (42%) and oxygen (15%), and its The average surface temperature of 179 degrees Celsius, up to 427 degrees Celsius, a minimum of -173 degrees Celsius. Venus (Venus) Ancient China, also known as "Venus", "Chang", "Taibai", "star" and so on, the nine planets of the solar system 1. According to the order from the sun for the second. With an average distance of the sun 0.72 astronomical units, 108,210,000 Km. Size and the Earth is similar to the diameter of the Earth smaller than 5%, quality 82% of the Earth, the density of water, 5 .2 Times the revolution period of 225 days, the rotation period is 243 days, the rotation direction and the other planets the contrary, the surface cover Covered a very thick atmosphere, the most carbon dioxide, oxygen and water vapor low surface temperature as high as 480 degrees Celsius About. Venus surface of the magnetic field only one-thousandth of the Earth also has an ionosphere. Separately in the morning because of Venus Morning and evening in the sky, the ancient astrologers have been think there are two such planets, then sub - Do not be referred to as the "Morningstar" and "evening." In English, Venus - "Venus" (Venus) is an ancient Romanian Horse of the god of love and beauty. It has always been curly clouds shrouded in mystery at. Because of Venus and the Earth in size, mass, density and weight on very similar, and almost all of Venus and the Earth Formed simultaneously by the same nebula, astrologers will have them as sister planets. But recently scientists have discovered , Venus and the Earth in fact very different. Venus has no oceans, it has been the main ingredients for a thick oxide Carbon in the atmosphere surrounded by water does not. Its cloud is composed of sulfuric acid droplets. At the surface, it Equivalent to atmospheric pressure at sea level on the Earth 92 times. Because of Venus’s thick atmosphere of carbon dioxide caused by "greenhouse effect", Venus surface temperature up to 482 photo S degrees. Sunlight through the atmosphere will be hot roast Venus surface. Surface outward radiation of heat at the process by Atmospheric barrier, can not be distributed into outer space. This makes Venus than in Mercury also hot. Random surface of Venus is covered with many small craters. Because of Venus’s thick atmosphere, a diameter less than 2 kilometers Crater is almost impossible to retain it. And when a large meteorite in a small pit formed before the meteorite hit the surface of Venus, and its production Health and debris at the surface of the crater produced exceptional group. Volcanoes and volcanic activity of a lot of the surface of Venus. To Less 85% of Venus surface covered with volcanic rocks. Many lava flows hundreds of kilometers, fill the lowland, forming a broad Wide plains. In addition to hundreds of large volcanoes, more than 100,000 small crater Block embellishment at the surface of Venus. From fire Mountain emitted lava flows resulted in a long trench, ranging up to hundreds of kilometers, one of a range of ultra - Over 7000 kilometers. The topography of Venus is covered with vast lava plains and mountains of geological activities undermine or plateau. At Maxwell Hill Ishtar region are the highest mountain on Venus. Aphrodite highland region occupies almost Half of the equatorial regions. Magellan plans to obtain more than 2.5 kilometers of Venus images show the existence of the plateau zone prescribed Bright soil moist. However, in the Venus surface, liquid water are unlikely to exist, and could not explain the bright plateau Reasons. There was a presumption that these bright regions may be due to metal compounds. Studies have shown that this Some metals may be iron sulfide. It can not exist in the plain areas, but at high altitude is possible. These payments May also be an alien, and it led to the effect is the same, but the concentrations are lower. The Earth (Earth) The nine planets of the solar system, according to the order from the sun for the third stars, with the sun’s average distance of about 14,960 10,000 kilometers, the volume of around 1,083,200,000,000 cubic kilometers for the equatorial radius is about 6378 kilometers, the radius is extremely 6,3 57 kilometers, a difference of 21 kilometers. The average water density is 5.5 times the revolution period is 365.25 days, the rotation cycle 2 3:56. Revolution of the Earth orbit is an ellipse with the Earth equatorial plane into 23 degrees 26 minutes angle. So generated The length of the seasons and day and night. Surface has a solid crust. An area of 51,100 km, one of the total marine table Area of 71%, land is about 29%, surrounded by the atmosphere, nitrogen, oxygen, water vapor and other gas components. Earth Has a satellite - the moon. Used to distinguish the characteristics of the Earth are on a black background and blue water, brown and green Land and the large white cloud. We are the Earth’s atmosphere is 78 percent nitrogen, 21% are oxygen, the remaining 1 percent are other ingredients. Flat surface of the Earth Both the temperature is 15 degrees Celsius, the mean pressure of 101.3 Pa. The Earth are the only known solar system planets existence of life. Express our planet’s rotation and nickel iron lava nuclear Heart to generate a vast magnetic field, together with the atmosphere to prevent almost all from the sun and other stars Harmful rays. The Earth’s atmosphere for us to block a lot of meteorites, meteorite much at their arrival and before the Had been burned. Since the beginning of human space exploration, our own planet there is a greater awareness. The first man-made human beings to Ball satellite discovered a strong radiation zone, now called the Van Allen radiation belts. The causes are from Sports Express in the charged particles in the equatorial region of a circular region to capture the Earth’s magnetic field. Earth’s magnetic field By the solar wind into a droplet-shaped twist of this phenomenon is also found by satellite. We also found that once we identified Is very calm for the upper atmosphere, they are very active, and it during the day and evening to narrow expansion. Live by the sun Dynamic effects of the Earth’s upper atmosphere to affect weather and climate. Apart from the impact of the Earth’s climate, the sun’s activities are also our atmosphere for the brilliant performances. When the charged particle Son of the Earth’s magnetic field has been captured, they are with our planet’s pole impact air molecules so that these open air molecules Sending light, this is the "Aurora." Mars (Mars) Ancient China, also known as "荧惑," the nine planets of the solar system, according to the order from the sun for the fourth stars. And too Yang average distance 1.52 astronomical units, or 227,940,000 kilometers in diameter for 53% of the Earth, its size at Ranked seventh in the solar system. Quality for 11 percent of the Earth, the density of water is 3.9 times the revolution period of 687 days, Rotation cycle of 24 hours 37 minutes. Mars’s equatorial plane and orbital plane 23 degrees 59 minutes into the corner, so on Mars also has Four Seasons, a quarterly basis and around six months long. Very thin atmosphere, mainly composed of carbon dioxide, the surface temperature at Chek Road during the day and the highest, at 28 degrees Celsius, down to -132 degrees Celsius at night, white极冠of the main components of water ice Also has a small amount of dry ice, the size of极冠changes with the seasons. Sometimes disappear in summer and winter increase. Surface Comparing the same as the Earth has rocks, volcanic and desert regions. On Mars because of the rock, sand and sky are red Color or pink, so the planet is often also referred to as the "red planet." The southern hemisphere of Mars are similar to the moon covered with craters of the ancient plateau, while the Northern Hemisphere, mostly organized by young plains Composition. Mars 24 kilometers high on the "Olympus" Mountains can be called the solar system are the highest mountains. Away from fire Stars around tens of thousands of kilometers, have two very small stars, which are the Martian satellites. In Chinese, the name is reminiscent of Mars to the "fire" and hot, but in fact, this red planet is Abnormal cold and dry. Nevertheless, Mars is still in the solar system and earth are the most similar to a planet. It Smaller than the size of the Earth, the atmosphere thinner than the Earth. A very thin atmosphere of Mars, the Earth’s atmospheric pressure is only 7 thousandths. The main components of the atmosphere of Mars are dioxoketene CFCs, and other ingredients are nitrogen, argon, oxygen and so on. Mars atmospheric water at the proportion of only 0.03% . Thus abnormal drying the surface of Mars. Mars the average temperature of minus 55 degrees Celsius, while the larger temperature difference: In the summer, daytime temperatures up to Twenty degrees Celsius, while in winter the temperature can be as low as minus more than 100 degrees Celsius. Mars often have strong winds, And thus often leads to large-scale dust storms. Scientists have found that many areas on Mars have been signs of erosion, but it seems to criss-cross the riverbed Telling us that Mars once had liquid water, they gather into large and small lakes, and even marine . Scientists, it was explained that at the early formation of Mars, the planet by thick clouds of carbon dioxide The parcels, resulting in a powerful "greenhouse effect" by the solar radiation, heat the surface of Mars have been obstructing the clouds Separated, can not be distributed to the outer space, making temperatures rise, so that liquid water to exist. At that time, the warmth of the Martian Humid, you may have been bred to life. Mars has two poles at many solid-state carbon dioxide (dry ice), scientists have speculated that in these enormous ice Cover may exist below the water-solid. Jupiter (Jupiter) Ancient China, also known as "岁星," one of the solar system planets. According to the order from the sun for the Fifth stars. And too Yang average distance of 5.20 astronomical units, or 778,300,000 kilometers. Volume and quality than the other eight planets Combined, and the equatorial diameter of the Earth 11.18 times for the 142.8 thousand kilometers. The quality of the Earth’s 317.89-fold , Density of water 1.3 times, public transfer cycle 11.86, the rotation cycle for the 9:50 is the fastest one rotation Stars, so the shape is very flat. Jupiter atmospheric shading shows staggered parallel to the equator of the cloud band, the temperature was about -12 1 degrees Celsius. Well-known Great Red Spot are embedded in the cloud band of clouds. Atmospheric thickness of about 730 kilometers. Atmospheric depths have Water vapor, but the total amount of less than hydrogen. There are acetylene, ethane and phosphine. Jupiter’s magnetosphere has been a huge package Around with the Earth’s magnetosphere similar to, but charged particles within the magnetosphere the energy of the radiation of the Earth is about one million times. Wood Stars than the Earth magnetic field strong 20-40 times, suggesting that Jupiter has its own energy. Jupiter has 13 satellites, consider someone There may be satellites fourteenth. There is a halo of Jupiter and Aurora
医学英语科普文章
身体健康是从物质意义对人的生活质量的理解。下面是我带来的 医学英语 科普 文章 ,欢迎阅读!
医学英语科普文章1
话说水果、蔬菜和疾病
Five-a-Day "No Benefit" 每日五份没效果
One of the most commonly-held beliefs regarding health and nutrition in the UK has beenfound to be untrue, according to a new scientific study.
For many years British people have been recommended to eat at least ’five-a-day’ – that isfive items of fruit or vegetables every day in order to improve their health and reduce thelikelihood of illness, in particular cancer.
The recommendation was first put forward in 1990 by the World Health Organizationwhich said that the ’five-a-day’ diet could prevent cancer and other chronic diseases.
Since then the advice has been a mainstay of public health policies in many developedcountries, such as the UK, where the population eat a high proportion of junk food.
Many health campaigns have promoted the advice, and indeed much food packaging inBritain states how the contents will constitute part of your five-a-day.
However, a study of 500,000 Europeans from 10 different countries refutes the commonly-believed suggestion that up to 50% of cancers could be prevented by increasing the public’sconsumption of fruit and vegetables.
Instead the study, which is led by researchers from a well-respected New York medicalschool, estimates that only 2.5% of cancers could be averted by eating more fruit and veg.
It seems that the key to avoiding cancers is to have an overall healthy lifestyle whichincludes not smoking or drinking a lot of alcohol, taking exercise and avoiding obesity.
But medical charities have spoken out to remind people that diet is an important factor instaying healthy, and that even a 2.5% reduction in cancers is still a positive step.
Cancer Research UK said: "It’s still a good idea to eat your five-a-day but remember thatfruits and vegetables are pieces in a much larger lifestyle jigsaw."
医学英语科普文章2
致命的军团杆菌
legionnaires’ disease is a serious and sometimes fatal form of pneumonia. legionnaires’ disease is caused by infection with legionella bacteria which are found naturally in the environment and thrive in warm water and warm damp places. man-made water systems sometimes provide environments that let legionella bacteria increase to large numbers. these man-made systems include showers, spa pools, fountains, and air conditioning cooling towers. people usually get legionnaires’ disease by breathing in mists that come from a water source contaminated with legionella bacteria.
an estimated 8,000 to 18,000 people get legionnaires’ disease in the united states each year. some people can be infected with legionella bacteria and have mild symptoms or no illness at all. patients with legionnaires’ disease usually have fever, chills, and a cough, which may be dry or may produce sputum. some patients also have muscle aches, headache, tiredness, loss of appetite, and, occasionally, diarrhea. from the time of infection with legionella bacteria, it takes 2-10 days for symptoms to appear. in most cases, symptoms begin after 5-6 days. legionnaires’ disease is treated with antibiotics, such as erythromycin. the earlier that treatment is begun, the better the outcome.
the first known outbreak of legionnaires’ disease was in philadelphia, usa, in 1976. a total of 221 people contracted the disease and 34 died. most of those that died were legionnaires and that’s how the disease got its name. the second largest outbreak was at the stafford hospital in england in 1985; a total of 101 people contracted the disease and 28 died.
军团病是一种非常严重的、有时可以致命的肺炎。军团病是由军团杆菌引起,这种细菌产生在自然环境中,在温水里及潮热的地方蔓延。人工供水系统有时也能为军团杆菌的大量繁殖提供生存环境。这些系统包括淋浴器、矿泉池、喷泉以及空调设备的冷却水塔。人们通常是由于呼吸了被军团杆菌污染的水源散发的水雾而传染上军团病的。
据估计,在美国每年都有国每年都有8000~18000人感染上军团病。有些军团病感染者所表现出来的症状比较温和,甚至根本就没有得病的迹象。军团病患者通常有发烧、畏寒及干咳或咳痰等表现。部分患者还有肌肉疼痛、头痛、疲劳、食欲不振及偶尔腹泻等症状。这种病的潜伏期约为的潜天。许多病例表明,出现症状需要状需要5~6天的时间。军团病可以用红霉素等抗生素进行治疗,越早治疗效果越好。
军团病已知的首次爆发是在发是1976年美国费城,221人感染疾病,其中死亡34人。由于大多的死者都是军团成员,因此称为军团病。该病的第二次大爆发是1985年在英国的斯塔福德医院。这次101个被感染者中有28人死亡。
医学英语科普文章3
女性最佳生育年龄
For women who want to have children, planning the right time is a difficult decision. In recent years, many women have opted to put off having kids until their late 20s and well into their 30s — focusing on finishing school, building their careers, traveling, and maybe even paying down their student loans before taking the leap into parenthood. Statistics show that women are waiting longer and longer to have kids — the current average age of first-time moms is up to 26.3, up from 24.9 just 15 years ago.
对于想要孩子的女性来说,合适的时间是一个艰难的决定。近年来,很多女性选择在20岁末甚至30多岁才要孩子,主要原因是她们忙于完成学业、发展职业生涯、旅行、甚至选择在为人父母之前偿还助学贷款。数据表明,女性的生育年龄越来越晚——生第一胎的平均年龄从15年前的24.9岁上升到现在的是26.3岁。
The choice to have children is extremely personal and of course there’s no wrong answer when it comes to being ready to be a mom. But according to Dr. Gillian Lockwood, medical director at the Midland Fertility Clinic in the UK, there is an ideal age when our bodies are best suited to pregnancy. Can you guess what it is?
要孩子的选择是一个非常私人的话题,选择什么时候做母亲都没有错。但是英国米德兰生育诊所的医学主任Gillian Lockwood表示,我们的身体有一个最佳的生育年龄。你能猜到是多少岁吗?
I’ll give you a hint: it’s when many of us have a quarter-life crisis. Also: when it finally becomes affordable to rent a car.
提醒一下:最佳的生育年龄是在大多数人的“青年危机”时,也是我们终于能租得起车的时候。
Yep. According to Lockwood, the ideal age to get pregnant is 25.
Lockwood表示,是的,最佳的生育年龄是25岁。
Unfortunately, says Dr. Lockwood, it’s also the age when motherhood is low on many women’s list of priorities. She explained in the Evening Standard:
Lockwood医生说,不幸的是,对很多25岁的女性来说,成为母亲并不在她们的优先任务清单上面。Lockwood医生在《伦敦标准晚报》上解释说:
“Age 25 is exactly the time when today’s young women have left university, are trying to get off on a good career, trying to pay back their student loans, trying to find someone who wants to have babies with them and trying to get on the housing ladder.”
“25岁的当代年轻女性刚刚大学 毕业 ,事业起步,忙于偿还助学贷款,找男朋友,努力买房。”
Dr. Lockwood also had some harsh words about fertility treatments being marketed as a viable option to women over 40. “The bleak reality is that the chance of IVF working with your own eggs once you are 40 is absolutely abysmal,” she said. “Would we let, yet alone encourage, patients to pay for an elective operation with a less than five percent chance of working?” While that may be Dr. Lockwood’s opinion, plenty of wannabe parents may be happy to take those chances.
Lockwood医生还批判了向40多岁女性推销不孕疗法的行为。“事实很残酷,如果你超过了40岁,用卵子进行体外受精的成功几率非常低,”她说。“谁会允许甚至鼓励病人做成功几率低于5%的择期手术?”这是Lockwood医生的观点,但仍有很多想要孩子的父母很愿意抓住这些机会。
It’s worth reiterating that there are so many factors that inform the choice to have kids and only you can decide when — and IF — you want to become a mother. Whether you choose to have kids at 20, 30, 40, or beyond; biologically, through a surrogate, or via adoption, always listen to your own body and make the decision that makes sense for your own life. You know what’s right for you.
特别强调的是,很多因素会影响要孩子的时间,只有你自己可以决定是否想成为一位母亲。不管你是在20岁、30岁、40岁甚至更大的年龄要孩子,是自己生、代孕还是收养,你都要听从自己的身体,做出对生活有意义的选择。你知道什么是最适合自己的。
科普文章英语怎么说
翻译如下科普文章popular science articles或 popular science writing例句医学英语科普文章是随着医学的发展而形成的一种文体形式,有其自身的特点。English popular science writing in medicine is a special style which has its own writing characteristics.
科普英语小作文
Does Technology Prevent Creativity? Thanks to Lowell Monke, I am getting rather critical about tools and technology supporting creativity. In many cases technology distracts our concentration, causes problems to our social network and interferes with our natural rhythm of life. Monke’s "Breaking Down the Digital Walls" is an interesting book and I am looking forward to read the forthcoming book. In the meanwhile, please take a look at his thought-provoking article "The Human Touch" . Just to give you an example of Monke’s thinking: "What ’Information Age’ values tempt us to forget is that all of the information gushing through our electronic networks is abstract; that is, it is all representations, one or more symbolic steps removed from any concrete object or personal experience". Another wake-up call came, when I read an interesting report from National Science Foundation (NSF) workshop about Creativity Support Tools. There were some guidelines for these Creativity Support Tools introduced . To me they are like from an HCI manual and similar to Shneiderman’s "Leonardo’s Laptop: Human Needs and the New Computing Technologies" - you remember those 4-phases: Collect - Relate - Create - Donate.What bothers me is the concept "Social Creativity" described the report. This concept and the related research is to me very inconsistent, it is mostly based on communities-of-practice research, not creativity research. I noticed it already when I participated a social creativity session in the HCI International (UAHCI) conference in Las Vegas. 仅供参考。
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