单词：atavo-tissue
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When humans have a heart attack, heart muscles die after being cut off from their blood supply. But what if the heart could grow new muscle to replace the dead tissue? Some amphibians can regrow body parts, even entire limbs. But humans and other hig
VOA标准英语2011年(三月)
This is Scientific American's 60-Second Science. I'm Chirisopher Intagliata, got a minute? But mum, that's not fair! sound familiar? Even as children we hate getting gypped, whether it's fewer slices of pizza or lousy presents from Santa. More surpri
Scientific American(四)月
BEIJING, March 25 (Xinhua) -- Datang International Power, a listed unit of China Datang, a major Chinese power producer, said Sunday its net profit fell 22.78 percent year-on-year to 1.91 billion yuan (303.2 million U.S. dollars) due to rising therma
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Beating Heart Tissue from Stem Cells In a study in the journal Science, researchers explain how they used mouse embryonic stem cells and microchip technology to create heart muscle tissue that actually beats. Cynthia Graber reports One of the goals o
60秒科学
The White House and congressional Democrats continue to press for a federal-tax-cut extension that would benefit nearly all wage and salary earners, but especially the middle class. Paying for the extension remains a sticking point on Capitol Hill, w
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在外国如何打出租车Takeataxi A： Manhattan Square， please. B： All right， sir. When are you supposed to be there？ A： Id like to go around the city， if you dont mind. －请到曼哈顿广常 －好的，先生。要求几点到。
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