单词：phenylhydrazine levulinic
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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
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
Scientific American(三)月
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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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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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
Indonesia Clinic Discounts Healthcare for Conservation-Minded Communities Getting access to adequate health care can be difficult in many parts of rural Indonesia, a necessity that often involves long journeys to overcrowded clinics. And once there,
VOA标准英语2011年(十月)
DEVELOPMENT REPORT – May 20, 2002: AIDS Clinic Competition By Jill Moss This is the VOA Special English Development Report. An American organization called Architecture for Humanity has announced an
农业与发展
Wounded Syrians Treated at Secret Clinic in Lebanon Amran, 6, is one of the youngest patients in this hospital. He has difficulty walking. When he shows his leg, its easy to see why. A chunk is missing from his shin. The hole is surrounded by red sca
VOA标准英语2012年(二月)
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
英语新闻
SUVA, March 14 (Xinhua) -- Some 300 diabetes patients（有耐心的 ） undergo amputations every year in Fiji and the trend is worrying the authorities. This is according to research carried out by the country's Physiotherapy Associations which sho
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