新编大学英语教程第四册Unit 13

[1] Overlooked in the arguments about the morality of artificially reproducing life is the fact that, at present, cloning is a very inefficient procedure. The incidence of death among fetuses and offspring produced by cloning is much higher than it i

【轻松英文阅读】拯救猛犸象

The woolly mammoth was a very large elephant-like mammal that lived on Earth several thousand years ago. Some mammoths grew to be four meters high and the largest weighed almost nine tons. Both male and female mammoths had very large tusks and walked

历史上的今天-Today in History 2012-02-28

Feb 28th, 1953, in Britain, scientists say and they found the double helix structure of DNA, the molecule that contains the human genes. Years later, Francis Crick describes this discovery that he and fellow scientist James Watson made. Biological sy

历史上的今天-Today in History 2013-02-28

Feb 28th, 1953, in Britain, scientists say they found the double helix structure of DNA, the molecule that contains the human genes. Years later, Francis Crick describes this discovery that he and fellow scientist James Watson made. Biological system

历史上的今天-Today in History 2015-02-28

Feb 28th, 1953, in Britain, scientists say and they found the double helix structure of DNA, the molecule that contains the human genes. Years later, Francis Crick describes this discovery that he and fellow scientist James Watson made. Biological sy

高质量睡眠-了解你自己的睡眠类型(1)

Better Sleep 高质量睡眠 Know your sleep type 了解你自己的睡眠类型。 Some people like Margaret Thatcher,Gandhi and Winston Churchill may have famously thrived on less sleep but they're a rarity. 诸如撒切尔、甘地和丘吉尔等人

经济学人116:孤独会对你的健康不利的原因

Science and Technology Healthy living Mind and body 科技 健康生活 身与心 The reason loneliness could be bad for your health 孤独会对你的健康不利的原因 SCIENCE has many uses, but it doesn't often produce handy pick-up lines. Rece

经济学人310:表观遗传学与健康 祖母的诅咒

Science and technology 科学技术 Epigenetics and health 表观遗传学与健康 Grandma's curse 祖母的诅咒 Some of the effects of smoking may be passed from grandmother to grandchild 祖母吸烟产生的影响可以会遗传至孙子或孙女

Developing Wheat Resistant to Leaf Rust

59 美国科学家正试图培育抗叶锈病小麦 DATE=6-19-01 TITLE=AGRICULTURE REPORT - Developing Wheat Resistant to Leaf Rust BYLINE=George Grow (Start at 59

Gene Therapy to Treat Hemophilia

64 基因疗法治疗血友病疗效有限 DATE=6-28-01 TITLE=SCIENCE REPORT - Gene Therapy to Treat Hemophilia BYLINE=Nancy Steinbach (Start at 01'02

VOA慢速英语2010年-Agriculture Report_ Mapping the Way to

This is the VOA Special English Agriculture Report. Soybeans are eaten by people and fed to animals. Some farmers grow them to replace lost nitrogen in the soil. Soybeans were first grown in Asia thousands of years ago. Now scientists have a full gen

每日一词【271】breakthrough：突破

今天我们要学的词是breakthrough。 Breakthrough, 是突破的意思。最近，加拿大的一组科研人员发现了一种独特的基因，可以阻止癌细胞繁殖，发展成为肿瘤。They made a significant cancer breakthrough, 他们

科学家最新研究 人类寿命上限120岁

The number of people living past 100 has soared by 71 per cent in the past decade. And while one expert believes this figure will continue to rise, he stated that anyone hoping to live for double or triple this time will be disappointed. Speaking at

科学家称基因编辑技术应该留在实验室

Scientists: Gene Editing Should Stay in Laboratories 科学家称基因编辑技术应该留在实验室 Scientists are debating how to limit their newly-discovered power to change genetic structure. Scientists already modify the genes of farm animal

缓解疲劳，闻咖啡比喝咖啡更好

清晨起来，一杯新鲜的研磨咖啡可以让人精力充沛。 A cup of freshly ground coffee is what it takes to get some people moving in the morning. 但一项最新的研究表明，这种功效可能是咖啡的香气而不是咖啡本身产

英文短篇故事（纽约）312 The Subway Push

Sally and Gene were running late. It was a hot summer evening. It was even hotter in the underground subway station. Finally, the train arrived. It was crowded. The doors opened. Nobody exited. Sally tried to get inside. But a woman was standing near

万物简史 第441期:小生物的世界(12)

In the early days, this was an exceedingly painstaking process. 早年，这是个极费力气的过程。 Work on a single bacterium could easily consume a year. 研究一个细菌就可能一下子花掉一年时间。 At that time, according to Wo

万物简史 第453期:小生物的世界(24)

Viruses prosper by hijacking the genetic material of a living cell and using it to produce more virus. 病毒掠夺活细胞的基因材料，用来制造更多的病毒，从而大量生长。 They reproduce in a fanatical manner, then burst out in

实战口语情景对话 第265期:Trip to the Hospital 去医院

Adrienne: Hey, Ian, tell me about the time you were at the hospital. 埃德里安娜：嗨，伊恩，跟我说说你第一次去医院是什么时候吧。 Ian: What, the first time I went to the hospital? 伊恩：什么，我第一次去医院？

TED演讲:科学解释之新探(6)

If the axis-tilt theory had been refuted, 倘若地轴倾斜理论被观察否定了 its defenders would have had nowhere to go. 它的支持者们就无路可退了 No easily implemented change could make that tilt 没有什么信手拈来的变动能