单词：tris(3-nitrophenyl)methanol
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Many of the Burgess specimens have now been assigned to living phyla just where Walcott put them in the first place. 许多布尔吉斯标本现在已经归到活着的动物的门里就是沃尔科特最初放置它们的地方。 Hallucigenia and s
万物简史
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This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro
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Fun Fact: Alligators Can Regrow Teeth 有趣的事实：短嘴鳄可以再长牙齿 Fun fact about alligators: they can regrow any of their eighty teeth up to fifty times. Which is pretty impressive, especially compared to us relatively dentally chal
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In other countries, women usually take the lead in cabaret. But here in Thailand many feel they are just not the right gender for the job. In Thai society, women are usually very prim and proper, this profession requires them to be outgoing, cheeky
国家地理2007年
its time again for the A Moment of Science mailbag. A listener writes: Dear A Moment of Science, Ive always been fascinated by volcanoes. So I was wondering: How well can scientists predict when and where a volcano will erupt? Intersting question. Th
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分集介绍：导数，商数，正弦和余弦 Derivatives.of.products.quotients.sine.cosine
麻省理工学院公开课：单变量微积分
分集介绍：导数，斜率，速度与变化率 Derivatives.slope.velocity.rate.of.change
麻省理工学院公开课：单变量微积分
This is Scientific American's 60-Second Science. I am Steve Mirsky.Got a minute? Talk about your vicious cycles. A new study finds that belly fat could be making you hungrier. Which would lead to more belly fat. The research was performed at the Univ
Scientific American(四)月
Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the
Scientific American(十一)月
Low-cost airlines have changed the travel business. Carriers like Southwest and Jetblue serve fewer cities than traditional airlines and offer fewer perks to passengers. They force the bigger carriers like United and Delta to change their business pr
2005年NPR美国国家公共电台
[全屏观看] 点击右键- 另存为 可保存这个Flash影片 Silly Sausage是Nitrome于2011年5月28日发行的一款益智类游戏，它是以香肠在尽量不碰到其它损失生命物体的情况下吃光所有的钻石再到达终点为标
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HEALTH REPORT - New Heart Drug Shows Promise in African Americans By Cynthia Kirk Broadcast: Wednesday, November 17, 2004 This is Bob Doughty with the VOA Special English Health Report. Heart failure
健康与经济
WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to astudy published Thursday in the online edition of jo
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For as long as people have been drinking too much, they have been searching for a cure for that dreaded morning after hangover. 只要一个人有过酩酊大醉的时候，他们就一定曾寻找过解决宿醉之后可怕的第二天清晨。 Raw
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At least 23 people have died on the Indonesian resort islands of Bali and Lombok after consuming locally produced palm wine made with methanol, a fuel used for lanterns. The first victims began arriving at Sanglah General Hospital in the Balinese ci
VOA标准英语2009年(六月)
HAVANA, Jan. 2 (Xinhua) -- The Australian swimmer Chloe McCardel announced her intentions to swim across the Florida Straits without the protection of an anti-shark cage, Cuban media highlighted here Wednesday. According to Radio Havana Cuba, McCarde
英语新闻
YAN'AN, Shaanxi, Aug. 26 (Xinhua) -- The death toll from an expressway collision between a bus and a tanker in northwest China has risen to 36, local police said Sunday. The accident happened at around 2 a.m. in Yan'an, Shaanxi Province, when a doubl
英语新闻
Today we go on a journey. It starts in Sweden over 100 years ago; and then moves to London; and finally moves to future worlds and other planets. But we start in Sweden. Alfred Nobel spent his life finding ways to blow things up. He was born in 1833
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