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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
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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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By Claudia Blume Hong Kong 18 March 2007 Buzzing Hong Kong is better known for keeping lights on all night and the Wind turbine air conditioner running full blast, not saving energy. But engineers in the city have introduced an innovative wind energ
2007年VOA标准英语（三月）
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
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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
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By Deborah Tate 07 April 2006 Sweeping immigration reform legislation hit a roadblock in the U.S. Senate Friday, when a series of procedural votes failed to move the measure forward. Senate leaders ho
2006年VOA标准英语（四月）