有关自然科学的英语阅读文章

㈠ 生命科学、自然科学、地球科学的英语文章

natural science
Natural sciences research are organic or inorganic nature of things and phenomena of science. Natural sciences, including astronomy, physics, chemistry, earth science, biology and so on. Math is about the existence of the natural sciences are controversial. Some people think that math is a human sciences, but also someone think math is a branch of philosophy is a logical part of the study. However, math and natural sciences are closely related to the relationship between is indisputable. And natural sciences have different humanities, social sciences and engineering
自然科学
自然科学是研究大自然中有机或无机的事物和现象的科学。自然科学包括天文学、物理学、化学、地球科学、生物学等等。关于数学是否是自然科学存在着争议。有人认为数学是一门人文科学，也有人认为数学是哲学的分支，是逻辑学的一部分。但数学与自然科学之间息息相关的关系是无可争辩的。与自然科学不同的还有人文学、社会科学和工程学

㈡ 关于科学与自然的英语作文

China has a very long and brilliant history, whose people are so friendly and hospitable. But I am wondering why some people pay such little attention to the environment and nature. In many places of the countryside, rivers have become stinking sewers and brooks have disappeared. Heaps of garbage obstructs the scarce flow of dirty water. The grounds are littered with plastic bottles and bags. People are cutting down trees even though it is illegal. In some towns, rubbish is hidden behind walls. Garbage cans are often of little use, making cleaners must rush all day long and also by night to clean the rubbish.
我觉得这行望采纳(∩_∩)O~

㈢ 关于科学的英语文章

True science hero
-爱因斯坦

"Peace cannot be achieved through violence, it can only be attained through understanding." Albert Einstein
“靠暴力不会得到和平，只能靠相互理解”-爱因斯坦
Albert Einstein is a true science hero, not only because of his genius and physics theories, but also because of his philosophy and compassion for the universe and its creatures.
爱因斯坦是科学英雄，不仅表现在物理学上，更在於他对宇宙万物的同情和哲理上。。

Einstein's groundwork in physics made possible technology as we know it today, from the space shuttle to the Internet we're using right now.
我们今天享受爱因斯坦的理论成果，从宇宙飞船到网络。。。
It may also be said that his work led to the development of nuclear warfare.
Einstein once said: “I made one mistake in my life when I signed that letter to President Roosevelt advocating that the atomic bomb should be built. ......"
Einstein himself is a peaceful man.
有人说他导致了核武器的产生。。
爱因斯坦曾经说过，‘我一生最大的错误就是提出核武建议。。“
爱因斯坦本人是个爱和平的人。
On April 18, 1955, Albert Einstein, one of the greatest natural philosophers of all time, died, leaving behind a legacy of thought-provoking scientific theories.
1955年4月18日，伟大的科学英雄，人类跨时代的伟大的自然哲学家，永别人世！！！
Everything about Einstein,
his smile,他的笑容
his voice,声音
quotes and 格言
his passion,热情
still exist in my mind!
始终存在于我的脑海之中！！！！

㈣ 求一个关于我喜欢科学的英语作文，谢谢，快点儿啊

Science and technology have changed our life thoroughly throughout the history,especially in the last century.There is a prevailing understanding about science and technology among the general public that they are the same thing of o different names but they are acutally o things.Science is kind of series of theorrtical concepts and people can accept it or not,and it will not affect mom people's life to a large extent,but it's a different way when it es to technology because technology has more pratical effect on people.追问

好多不会单词

科学家的英语作文

[科学家的英语作文]Thomas Edison and Benjamin FranklinThomas Edison lived from 1847 to 1931; he is most famous for inventing the light bulb. Benjamin Franklin lived from 1706 to 1790, and he is credited with discovering electricity.Both men were inventors, and both were born in the United States. As children, both Franklin and Edison had limited schooling.Both inventors are said to have self-taught themselves mostly through their love of reading.Franklin and Edison were both interested in electricity, and I think they would have had a lot to talk about if they had ever met face-to-face.They were different too though. They lived in very different times. While Benjamin Franklin discovered electricity. Edison's inventions and discoveries all required electrical currents: light bulbs, microphones, phonographs, fluoroscopes, etc.我好想成为科学家，因为如果我是一名科学家，我就可以创造出许多有用的东西，科学家的英语作文。

如果我是科学家，我会研制出一种手枪，这种手枪和我们平常见到的不一样，它可以自动收集空气转换成子弹，还可模敏蚂以自动定位瞄准目标，警察叔叔利用这把手枪就可以快速抓到犯罪分子，更好维护社会安全。

如果我是科学家，我会制造出一种可以折叠起来的房子，它可以放进背包，甚至可以装进口袋，这样就可以帮助那些灾后没有房子住的儿童，也可以让我们出外旅游变得方便，走到哪里就可以带到哪里。

如果我是科学家我就会制造出一种可以放出冷、热两用的机器，拿仿在炎热的夏天可以把热气吸进机器里，这样夏天就不觉得炎热，在寒冷的冬天会把冷气收集到机器里，冬天不会觉得寒冷，中学生作文《科学家的英旦埋语作文》。

利用这种机器，既改善了我们的生活环境，又能节约能源。

如果我是科学家，我会发明一种可以在天上飞、地上跑、水里游的汽车，这样我们就不需要这么多种交通工具，减少停放交通工具的麻烦，节约土地。

如果我是科学家，我会发明一种食品，只要吃了这种食品就可以连续三天都不会饥饿，这样我就可以帮助那些灾区急需食品的人们。

如果长大了我当上科学家，我就会发明或发现很多东西来提高我们国家高科技水平，为我们的学习、工作、生活带来许多方便，所以我现在要好好学习，积累生活和社会知识，争取长大以后当上伟大的科学家，做一个有益于社会和人民的人。

科学家是怎样炼成的？当然不是凭空出现的，他们的出现必然是有一个或多个因素导致的。

首先，要是一个很爱动脑，并且对科学极其热爱的人，这是一切因素的承载者，是为基础，是成为一个科学家的前提。

其次，要有一定的资金。

资金——作为科学研究的物质保证，起着不可替代的作用，它也决定着一个科不家能否完成他自己的实验，能否成为一个有名的科学家。

第三，也是最重要的，这个人要有坚定不移的意念，为科学研究献身的意念，还要有耐心，因为进行科学研究的过程必定是枯燥的，只有耐得住寂寞的人才能完整，完美地完成研究。

然后，就是作为一位科学家，一定要有在一定要有丰富的想象力，只有有了想象力，才能够想象到以前从未出现过的东西，然后进行研究，最终完成发明。

试想，如果爱迪生没有在大脑中完成为电灯的设想，那么，又从何而来的那一千零一次的努力，从何而来我们现在的灯火通明。

所以想象力也是十分重要的。

可见，一个人之所以能够成为发明家，不是只要勤奋这一项就足够的，而是多种因素集中在一个人的身上而炼就的。

写一篇有关科学影响我们的生活的英语作文

When we sit in front of the television to watch the colorful programs we hand on the mouse in the puter world; when we are in the spring season with relish eatingwatermelon...... We may have thought: what brings our life change so much? Is science!Is a great strength of science and technology, changing everything around us, changed the world! With the progress of science and technology, the face of the world what has changed? Grandma said: people live longer! Developed in science, hunger and diseasehas been a threat to the enemy of human existence, countless people by disease and starvation mercilessly killed precious life. China's establishment of the new China, the average life expectancy of the population was only 35 years old. No wonder her old grandmother before talking about ＂life rarely live to seventy＂ sigh. And now, what have Iheadache and fever, to the hospital to buy some medicine to fight a few needles. So, my grandmother very happy all day long to boast of good health, what people live a hundred years is not surprising ＂said! Dad said: our work easier! No longer the same --face loess back into the air like a grandfather when, on the hard physical labor, on theelusive God dinner. In the use of high-tech agricultural park, arable land, sowing,harvesting and other proceres can be used to manage the puter, to plete for agricultural machinery. It makes people from heavy manual labor freed. Mother said: our life better! Before, people always worry about the problem of food and clothing. The development of science and technology, let us fill the rice bag, filled with vegetable, not only to eat, and eat well, eat more rich. Last year, my family also built o four storey building. I also have their own little world, father is still in my room to install air conditioning, warm in winter and cool in summer, I can sit fortably An Jingjing, writingin reading story books. I want to say, I feel that the progress of science and technology,the world has bee *** aller! The annual Spring Festival, Zhang uncle next door tothe long-distance telephone, and as far away as Taiwan's brother call to congratulate,separated by thousands of miles of the family in the ear. You want to learn from India,along the way to travel over land and water, brave the wind and dew, experienced all kinds of hardships, had walked for several years before they reached their destination.Now, fast and safe vehicle, ship, aircraft and other transportation our footprints inalmost all the places on earth. The ＂five one＂ festival, our family went to the capital Beijing! In the east of the world, our ancestors invented gunpowder, the pass,printing, papermaking, creating its own brilliant history. We are lucky to grow in a new era, science has never been so dazzlingly beautiful flowers, the road of science has never been so wide. Students, let us from an early age to develop good habit of lovescience, science, scientific spirit, and climb the heights of science, to create a beautiful home.

科学实验为题的英语作文80字

In ancient times, many people believed the earth was a flat disc. Well over 2,000 years ago; the ancient Greek philosophers were able to put forward o good arguments proving that it was not. Direct observations of heavenly bodies were the basis of both these arguments. First, the Greeks knew that ring eclipses of the moon the earth was beeen the sun and the moon, and they saw that ring these eclipses, the earth's shadow on the moon was always round, they realized that this could be true only if the earth was spherical, If the earth was a flat disc, then its shadow ring eclipses would not be a perfect circle; it would be stretched out into a long ellipse. The second argument was based on what the Greeks saw ring their travels. They noticed that the North Star, or Polaris, appeared lower in the sky when they traveled south, in the more northerly regions, the North Star appeared to them to be much higher in the sky. By the way, it was also from this difference in the apparent position of the North Star that the Greeks first calculated the approximate distance around the circumference of the earth, a figure recorded in ancient documents says 400.000 stadium, that's the plural of the world stadium. Today, it's not known exactly what length one stadium represents, but let's say it was about 200 meters, the length of many athletic stadiums. This would make the Greeks estimate about ice the figure accepted today, a very good estimate for those writing so long before even the first telescope was invented.

求科普英语文章！！关于“生活与科学”！！！谢啊

My grandmother became a widow in 1970. Shortly after that, we went to the animal shelter to pick out a puppy to keep her pany. Grandma decided on a little terrier that had a reddish-brown spot above each eye. Because of these spots, the dog was promptly named Penny.Grandma and Penny quickly became very attached to each other, but that attachment grew much stronger about three years later when Grandma had a stroke. Grandma could no longer work, so when she came home from the hospital, she and Penny were constant panions.After her stroke, it became a real problem for Grandma to let Penny in and out because the door was at the bottom of a flight of stairs. So a mechani *** using a rope and pulley was installed from the back door to a handle at the top of the stairs. Grandma just had to pull the handle to open and close the door. If the store was out of Penny's favorite dog food, Grandma would make one of us cook Penny browned beef with diced potatoes in it. I can remember teasing my grandmother that she loved that dog better than she loved her family.As the years passed, Grandma and Penny became inseparable. Grandma's old house could be filled to the brim with people, but if Grandma went to take her nap, Penny walked along beside her and stayed by her side until she awoke. As Penny aged, she could no longer jump up on the bed to lay next to Grandma, so she laid on the rug beside the bed. If Grandma went into the bathroom, Penny would hobble along beside her, wait outside the door and acpany her back to the bed or chair. Grandma never went anywhere without her faithful panion by her side.The time came when both my grandmother and Penny's health were failing fast. Penny couldn't get around very well, and Grandma had been hospitalized several times. My uncle and I lived with Grandma, so Penny was never left alone, even when Grandma was in the hospital. During these times, Penny sat at the window looking out for the car bringing Grandma home and would excitedly wait at the door when Grandma came through it. Each homeing was a grand reunion beeen the o.On Christmas Day in 1985, Grandma was again taken to the hospital. Penny, as usual, sat watching out the window for the car bringing Grandma home. Two mornings later when the dog woke up, she couldn't seem to work out the stiffness in her hips as she usually did. The same morning, she began having seizures. At age fifteen, we knew it was time. My mother and aunt took her to the veterinarian and stayed with her until the end.Now the big dilemma was whether to tell Grandma while she was still in the hospital or wait. The decision was made to tell her while she was in the hospital because when we pulled up at the house, the first thing Grandma would look for was her beloved Penny watching out the window and then happily greeting her at the door. Grandma shed some tears but said she knew that it had to be done so Penny wouldn't suffer.That night while still in the hospital, Grandma had a massive heart attack. The doctors frantically worked on her but could not revive her. After fifteen years of loving panionship, Grandma and Penny passed away within a few hours of each other. God had it all worked out – Penny was waiting at door when Grandma came Home. 我的祖母成了寡妇， 1970 .不久，我们去畜舍挑小狗陪她.奶奶决定对小猎犬了红褐色场以上，每眼.由于这些景点中，狗被及时命名为竹. 奶奶及竹很快成了非常重视对方，但扣押的增长十分强劲，约三年后，当外婆了，终年65岁.外婆不能再工作，所以当她回家，从医院，她和竹不断的同伴. 之后她中风，它成为一个真正的问题，奶奶让竹中出，因为大门在底层的楼梯.这样一个机制，用绳子和滑轮装置，从后门句柄在顶部的楼梯.奶奶刚拉把手打开和关闭车门.如果商店是出一分钱的狗喜爱的食物，奶奶将使我们其中库克竹馅料牛肉与洋葱，土豆而已.我记得取笑我姥姥说，她很喜欢狗比她爱她的家人. 随着岁月的推移，奶奶及竹成为密不可分的.奶奶的老房子可填至7.6人，但是如果奶奶去把她的行动，竹走过身旁待在她身旁，直到她醒来.至于竹岁，她再也无法跳起来于床上，以奠定未来阿妈，让她放在地毯旁边的床上.如果奶奶走进浴室，将竹蹒跚沿她旁边，等候在门外，并陪同她回到床上或椅子.奶奶没任何未经她的忠实伴侣的身旁. 时间来到时，无论是我的祖母和篙生均未能迅速.竹不能惟我独尊很好，奶奶曾多次住院.我叔叔和我住同奶奶，让竹从来孑然一身，连奶奶时，在医院昏迷了.在这些时候，竹坐在窗口看出去，为使汽车奶奶回家就会兴奋等候在门口时，奶奶进来.每颂是一个规模宏大的团聚两者之间. 圣诞节当日，在1985年，外婆又被送往医院.竹...

科学成就重要性的英语作文

不管人们有没有意识到，科学技术已经深深的影响着我们的日常生活，在经济社会发展扮演着不可或缺的角色。

21世纪以来，科学技术，尤其是计算机网络技术、电子信息技术的飞速发展，使得手机、电脑那些昂贵的奢侈品步入寻常百姓家，成为我们生活的必需品。

想象一下，如果没有手机，我们如何随心所欲地与亲人保持联系呢；如果没有网络，我们又如何与远在异国他乡的朋友谈天论地；如果没有高清晰的电视技术，我们又如何享受华丽的好莱坞电影？当然，我们也必须承认，科学技术在一定程度上也改变着我们的生活方式，改变着我们的文化

科学发展让人变勤奋英语作文

科学技术是第一生产力，它在人类历史发展的过程中，扮演着重要的角色。

在人类生活中，科学技术广泛应用于各个领域。

在农业方面，由于科学技术的应用，人类培育出杂交水稻、转基因水果......使粮食的产量不断提高、品质不断优化。

人类还发明了各种各样的播种机、施肥机、收割机......使人类在农业方面投入的劳动力越来越少。

在医疗方面，由于科学技术的应用，人们发明了各式各样的高科技医疗器械、药物，它可以病人在没有任何痛苦的情况下进行治疗，使人类的寿命不断延长。

在国防方面，由于科学技术的应用，各国的科学家发明了各种科技武器――航空母舰、导弹、战斗机、雷达等。

它们在捍卫国家领土完整方面起着重要的作用。

在生活方面，由于科学技术的应用，我们发明了电话、电视、电脑、汽车、飞机......使我们可以上天入地，在千里之外可以互相联络。

科学技术真是太奇妙了！科学家们真是太伟大了！

科学的趣味英语作文

妈妈是最疼爱我们的人，是最熟悉我们的人，是最了解我们的人，妈妈的爱是无私的爱，有人说如细流，有人说如大树，而我说妈妈的爱就如同一串串风铃，陪着我们走过一个又一个的春夏秋冬。

在我床前，一直挂着一串粉红色的风铃。

每当风儿从窗户吹进来，会发出清脆悦耳的 *** ，就像妈妈的叮咛。

我的妈妈长着一头乌黑秀丽的长发。

她那有神的大眼睛就像风铃顶部的小太阳，散发着爱的光芒。

她的嘴巴就宛如那叮咚碰撞的四根银灰色的小棒，小巧玲珑，能说会道。

而我就像那小棒中的小珠子，时不时碰撞出欢乐的火花。

小时候，我动不动就喜欢哭。

那哭声惊天动地，连恶狼都能吓跑。

那时候，妈妈很辛苦，整天上班，带孩子，烧饭，洗衣服，到

【有关科技的英语短文】谁有有关科学家的英语作文~~~越多越好~~~...

1. How to spend my weekendIam going to prepare for my lessons because the Mid-term exam is ing. I am sure if I have good preparation, I will get good grades. I am going to help my parents do some housework because they work hard every day.Of course I will visit my good friend and play table tennis with him because doing sports is good for our health. I will surf the inter and listen to music because they are good ways to relax. I am sure I will have a busy and meaningful weekend. 我打算复习功课，因为期中考试即将到来，我相信如果做好充足的准备，我一定会取得好成绩的。

我打算帮父母做些家务，因为他们整天忙于工作。

当然了，我要拜访我最好的朋友并和他一起打乒乓球，因为做运动有益于身体健康。

我要上网并听音乐，因为他们是最好的放松方式。

我肯定我会过一个忙而有意思的周末的。

2 How to learn English wellLearning English just like learning any other language, is hard work so my first advice is to spend much time practicing using English every day. Besides, we should listen to the teacher and take notes carefully in class. Go over what is learnt regularly and finish doing our homework carefully. Listen to English radio programmes, read English stories and newspapers, watch English films and TV programmes ,keep a diary in English and attend English debbates and speech contests. If we make mistakes, correct them at once and try not to make the same mistakes. What's more, we should look up new words in the dictionary before class and prepare each lesson carefully before class. I believe if we work hard and have good ways of learning English, we will learn English well.学习英语就象学习其他语言一样是艰辛的。

因此我的第一个建议是每天花多点时间练习使用英语。

除此之外，我们应该上课认真听讲、记笔记。

定期复习所学内容，认真做作业。

听英语广播，读英语故事和报纸，看英语电影和电视节目，用英语写日记，参加英语讨论和演讲比赛。

如果我们犯错误，就要立刻改正，尽力下次不要犯同样的错误。

而且，我们在上课前要查字典，认真准备每节课。

我相信如果我们努力学习、有好的学习方法，我们会学好英语的。

希望对你有帮助，祝：学业有成，更上一层楼

Newton was a great scientist. He was born in 1643 and died in 1727. He was born into a farmer's family. His father died a few months before his birth. He once studied in the 31 college of Cambidge University. He made a lot of discoveries, including the law of gravity. He was one of the most important figures in the history of science. He made great contributions to the world ,so we will respect him forever.自己写的，希望能帮到你~

转载请注明出处 » 求一个关于我喜欢科学的英语作文，谢谢，快点儿啊

㈤ 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 proce 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[1] to a cylindrical tube or window that mediates[2] 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[3] with the gene NR2B, so he introced extra NR2B genes into a batch of fertilized mouse eggs. In a normal mouse, the memory window is open for just 150-thousandths of a second. In Tsien’s specially engineered mice, the window opens for 250-thousandths of a second, long enough to make a remarkable difference in memory retention. When he pitted[4] 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 proce 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 proct 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。

㈥ 关于自然科学方面的英语短文

Nowadays,the science technology in our country China is more and more developed. We can buy ourselves many digital things and enjoy them. With the science technology,we are convenient to live in the world. Also, our life becomes more beautiful and comfortable. As a student, I should study hard. When I grow up,I will make contribute to people in the world. My favorite class is nature science, I believe in nearly future , I brought us many benefit in the nature science area.