Coffee Time

DIALOGUE 92 1--Would you like some tea? 2--I'd prefer some coffee, if you've got any. 1--Of course. How do you take it? 2--white with two sugars, please. =================================== 注解: 1）

经济学人:分子生物学 蛋白质的奥秘(3)

One common protein-contact prediction is that, if the side chain of one member of a pair of amino acids brought close together by folding is long, 一种比较普通的蛋白质接触预测就是，如果一对氨基酸的一个侧链折叠后很长，

经济学人:分子生物学 蛋白质的奥秘(2)

One of the leading researchers in the field of protein folding is David Baker of the University of Washington, in Seattle. 西雅图华盛顿大学的David Baker是蛋白质折叠领域研究者的领军人物之一。 For the past 20 years he and hi

SSS 2012-06-28

For many people summer equals tomatoes. Thats when folks can get their hands on gorgeous heirloom and traditional varieties, full of tomatoey flavor. Such tomatoes provide a stark contrast to year-round supermarket ones, famous for tasting like, well

SSS 2009-01-23

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. As Valentines day approaches, remember, its the thought that counts. Just ask a decorated cricket. Because according to a study published in the January

SSS 2009-04-28

This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. Many of the key molecules for life have a specific direction, or handedness: DNA twists to the right, amino acids to the left. Now scientists at the Nation

英语听力训练连载 listen 64

DIALOGUE 64 Coffee Time 1--Would you like some tea? 2--I'd prefer some coffee, if you've got any. 1--Of course. How do you take it? 2--white with two sugars, please. ==================================

Designer Antibiotics

85 新功效的抗生素在加州诞生 DATE=8-15-01 TITLE=SCIENCE REPORT - Designer Antibiotics BYLINE=Jerilyn Watson （Start at 1'04

专业术语—基因专业词汇A/B

SSS 2008-10-17

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. In 1953 a student named Stanley Miller did an experiment showing that the simple chemicals present on the early Earth could give rise to the basic buildi

SSS 2009-09-17

The early Earths oceans were home to a lot of interesting chemistry. Now scientists have found that amino acids thought to be present way back when could have been cooked into other compounds vital for lifean idea you should take with a grain of salt

SSS 2009-04-14

This is Scientific American's 60-Second Science. I'm Christie Nicholson . Got a minute? Altruism poses a problem for the theory of survival of the fittest. If we help others at a cost to ourselves, nice-guy behavior should die out, because we are giv

TED演讲:碳水化合物是怎么作用于你的健康的(1)

Which of these has the least carbohydrates? 这些（食物）中哪些含碳水化合物最少呢？ This roll of bread? This bowl of rice? Or this can of soda? 这卷面包？这碗米饭？或者这罐苏打水？ It's a trick question. 这是个陷

经济学人152:攻破屏障

Science and technology 科学技术 Creutzfeldt-Jakob disease 克雅氏病 Breaking down the barrier 攻破屏障 A glimmer of hope for a drug that treats disease caused by prions 药物治疗朊病毒感染疾病的一线希望 THE epidemic of mad-c

经济学人107:克雅氏病 攻破屏障

Science and Technology Creutzfeldt-Jakob disease Breaking down the barrier 科技 克雅氏病 攻破屏障 A glimmer of hope for a drug that treats disease caused by prions 药物治疗朊病毒感染疾病的一线希望 THE epidemic of mad-cow dis

PBS高端访谈:为何美国营养标签将改造

JUDY WOODRUFF:For the first time in two decades, the federal government is making significant changes to the nutrition labels on the food and drinks you buy at the store. Jeffrey Brown sorts through the details and what the changes are designed to do

世卫组织呼吁减少糖分的摄入

UNITED NATIONS, March 4 (Xinhua) -- The World Health Organization (WHO) on Wednesday called on countries to reduce sugar intake among adults and children to less than 10 percent of their total energy intake. According to WHO, a further reduction to b

万物简史 第407期:生命的起源(1)

19 The Rise Of Life 第十九章 生命的起源 In 1953, Stanley Miller, a graduate student at the University of Chicago, took two flasksone containing a little water to represent a primeval ocean, 1953年，芝加哥大学的研究生斯坦利米勒拿

万物简史 第408期:生命的起源(2)

Proteins are what you get when you string amino acids together, and we need a lot of them. 你把氨基酸串在一起，就得到了蛋白质。我们需要大量的蛋白质。 No one really knows, but there may be as many as a million types of pro

每天吃鲑鱼 像戒烟一样有益

Eating a small steak every day could be as good for you as stopping smoking, scientists say. 科学家说，每天吃一小块牛排可以像戒烟一样对你有好处。 People who eat lots of protein-rich food were found to have lower blood pressu