生活英语情景口语:差点就没命见你了...

G: is everything alright? M: yes, everything is fine. G: what took so long? I thought your flight was supposed to arrive 3 hours ago! M: didn't they announce that our flight was delayed? G: I didn't hear anything about a delay. I thought everything w

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，

TED演讲:如何把熟蛋变生(2)

Here's the key part. 接下来是关键的部分。 The solution nearest the wall spins faster than the solution closer to the middle. 离试管壁最近的溶液，要比中间的溶液旋转得更快。 That difference in velocity creates sheer str

Housing Maintenance Fund Hard to Apply

Here in China the housing maintenance fund is also known as the pension for apartments. Apparently, the fund is to be used for the maintenance and repair of property. However, applying to use the money is an extremely difficulty process. Li Dong has

SSS 2011-01-27

This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? Generations of American children have been told, Eat your broccoli! And for decades, researchers have known that broccoli and related vegetables like cauliflower and water

SSS 2008-09-04

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Conditions such as mad cow disease are caused by abnormally shaped proteins, called prions. Prions spread by causing other, normal proteins to misfold

办公室英语口语第51期:Fax machine maintenance 传真机

Fax machine maintenance A: Excuse me, Richard? Are you busy at the moment? B: Not really, Betty. What do you need? A: My fax machines on the blink. Would you take a look at it? B: Sure. I just need to do one other job first. How about if I come up ar

办公室英语口语第50期:A maintenance appointment 约定维

A maintenance appointment A: Hello? Is this the Maintenance Department? B: Yeah. Thats right. What can I do for you? A: Were having a lot of trouble with our printer. Could you come and take a look at it sometime this afternoon? B: Let me see. Yeah,

Do Animals Think?

As a matter of fact, milk always meets in the stomach a digestive juice which curdles it; the curdling of the milk is the first step in its digestion. A similar wrong idea is that fish and ice cream w

学个词 Learn a Word-VOA英语教学 3055 maintenance

今天我们要学的词是maintenance. Maintenance 维修，养护。The U.S. Interior Department will hike fees at the most popular national parks to $35 a vehicle to raise funds for park maintenance. 美国内政部宣布，全美游客最多的国家

SSS 2008-10-08

This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? The Nobel Prize in chemistry goes to three men who revolutionized molecular life science, Japans Osamu Shimomura and Americans Martin Chalfie and Roger Tsien. They dev

SSS 2008-05-05

This is Scientific American's 60-Second Science, Im Steve Mirsky. Got a minute? Biologists often attempt to construct a genealogy that shows the relationships of all life on earth. One well-accepted effort compares the nucleic acid sequences that cod

SSS 2009-10-07

The 2009 Nobel Prize in Chemistry goes to Venkatraman Ramakrishnan of the MRC Laboratory of Molecular Biology in England, Yale Universitys Thomas Steitz, and Ada Yonath of the Weizmann Institute of Science in Israel for their studies of the ribosome.

Maintenance 维修服务

Key Sentences（重点句子） 142．There seems to be something wrong with the toilet． 我房间里的抽水马桶好像出了点毛病。 143．We'll send someone to repair it immediately． 我们会马上派人来修的。 144．What's the tro

TED演讲:如何把熟蛋变生(1)

It's so obvious that it's practically proverbial. You can't unboil an egg. 很明显又众所周知的是。你不能把一个熟蛋变生。 Well, it turns out you can, sort of. 然而，其实在某种程度上你是可以的。 What thermal energy

Mad Cow Disease

74 疯牛病及其最新的检验方法 DATE=7-24-01 TITLE=SCIENCE IN THE NEWS #2134 - Mad Cow Disease BYLINE=Nancy Steinbach, George Grow VOICE ONE: This is Sarah Long. VOICE TWO: And this is Steve E

Using bacteria to generate energy hopeful

BEIJING, May 24 (Xinhuanet) -- Scientists revealed for the first time the molecular structure of proteins, which enables bacteria to transfer electrical charges, according to a new study. The revelation was published in Proceedings of the National Ac

Human fertilization process discovered

BEIJING, Aug. 22 (Xinhuanet) -- Researchers have discovered how a human egg captures an incoming sperm for fertilization, paving the way to help couples suffering from infertility, according to media reports on Monday. An international team of resear

健康生活 从食物搭配开始

There has been a lot of research done on the significance of food combining when we eat. Many believe that our stomach is designed to only digest food correctly one food type at a time or eating foods together that are compatible with each other. Thi

经济学人:熊猫遗传学:熊猫的第二拇指(2)

He and his colleagues noted parallel changes in the genes for three digestive enzymes whose job is to liberate two particular amino acids, lysine and arginine, from proteins. 他的团队发现三种消化酶基因相似的改变，这些消化酶的作