情景英语对话：Playing with Kids at the Park(2)

A: We made it! B: Great! There so much I want to play on. A: What do you want to do first? B: Lets go down the slide. A: Make sure youre careful. B: This is great! A: Howd you like the slide? B: The slide was so much fun. A: What would you like to do

情景英语对话：Playing with Kids at the Park(3)

A: Were here! B: I want to go play! A: What do you want to do first? B: I want to go down the slide. A: Dont run, and be careful. B: I will. This is so much fun. A: Did you enjoy the slide? B: Yes. It was great. I went so fast. A: What else do you wa

情景英语对话：Playing with Kids at the Park(1)

A: Here we are! B: Hurray! We finally made it to the park. A: What do you want to play on first? B: I want to go on the slide. A: All right, but be careful. B: Im having so much fun. A: Did you like the slide? B: I slid down it fast. A: Now what do y

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，

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

纯正英语一分钟-Pyramids

The Pyramids in Cairo are my favourite buildings in the whole world. I knew all about them when I was very young. They have always fascinated me. They really are one of the worlds wonders. People still dont know how they were built. I think they are

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

World Aids Day（世界艾滋病日）

According to UNAIDS（联合国艾滋病规划署）estimates there were 38.6 million adults and 3.2 million children living with HIV at the end of 2002, and during the year 5 million new people became infected with the virus. Around half of all peop

VOA慢速英语2009-THIS IS AMERICA - Kids, Before the Age of TV The

VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Steve Ember. VOICE TWO: And I'm Shirley Griffith. This week on our program, we bring you some laughs from old-time American radio shows. Bud Abbott, left, and Lou Costello LOU COSTELL

英文原版对话1000个:961 Kids and Money

Hanna: So, next week I have to do a debate in my finance class. Diego: Oh, really, what is your debate about? Hanna: Our debate topic is about whether we should teach finance to kids, so things like investment and the stock market. Things like tax. D

英文原版对话1000个:645 Future Kids

Todd: OK, Simon, I was wondering you know, you have a newborn son and before you know it, he'll probably be 10 years old, 12 years old, and I wonder if his life will a lot different than it was for us when we were 10 or 12. Like for example, educatio

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

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