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，

BEP72 Telephoning: Leaving a Voicemail Message

When you call someone but they arent there, often their voicemail picks up or answers the phone. Then you have to leave a message. Anyone who uses the phone in their job has to deal with voicemail. Have you ever started to leave a message on someones

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

原版英语小短文 196. He Hears Voices

Pete is schizophrenic. About one percent of people are schizophrenic. Schizophrenia is a mental condition. Its cause is unknown. There is no cure. Drugs can help a person live with the condition. But these drugs have side effects. Schizophrenia usual

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

2006年VOA标准英语-OIC Foreign Ministers Raise Concerns Over Insur

By Ron Corben Bangkok 23 June 2006 Foreign ministers attending a meeting of the Organization of the Islamic Conference have raised concerns over continuing violence in Thailand's largely southern Muslim provinces. The Thai government has responded t

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

2007年VOA标准英语-Visiting US Official Voices Support for Pakista

By Benjamin Sand Islamabad 16 June 2007 A senior U.S. official in Pakistan provided the strongest indication yet that Washington will stand by embattled Pakistan leader Pervez Musharraf. U.S. Deputy Secretary of State John Negroponte, in Pakistan for

2007年VOA标准英语-US Congress Hears Many Voices on Iraq

By Dan Robinson Washington 15 June 2007 As debate continues over Iraq, U.S. lawmakers have heard from a number of voices including U.S. military officials, and current and former U.S. and Iraqi diplomats. VOA's Dan Robinson was present during many of

ESL Podcast 433 – Describing People’s Voices

Adriana: Shhh, Im trying to listen to the radio. Ralph: How can you listen to that radio station? All of their deejays have such funny voices. Adriana: Thats precisely why I like it. Take this guy, Kevin. He has a deep , husky voice that I find reall

VOA标准英语2009年-UN Chief Voices Concern Over Afghan Civilian De

U.N. Secretary-General Ban Ki-moon says he is deeply concerned about civilian casualties in Afghanistan. Mr. Ban called for closer cooperation between civilian and military leaders. U.N. Secretary-General Ban Ki-moon, and Afghan President Hamid Karz

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

背单词运用数学知识强化记忆

用数学知识强化记忆 fourscore = four(4)score(20) 80 美国第16任总统林肯演说词第一句：fourscore and seven years ago， 那么，怎样才能记住 fourscore 这个词而终生不忘呢？只要我们了解了fourscore 的逻辑思维