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This is Scientific American Sixty Seconds Science, I'm Sophie Bushwick, got a minute? When Mexican tetra fish moved into darker caves long ago, they evolved to deal with the dark by becoming albino and going blind. A new research shows that the chang

发表于:2018-12-24 / 阅读(71) / 评论(0) 分类 Scientific American(一)月

T Tanshinone IIA 丹参酮IIA Tanshinone I 丹参酮I Tanshinone IIB 丹参酮IIB Taraxasterol 蒲公英甾醇 Taraxerol 蒲公英赛醇 Tauro ursodesoxy cholic acid 牛磺熊去氧胆酸 Taxifolin 花旗

发表于:2019-01-03 / 阅读(60) / 评论(0) 分类 医务英语

By Bill Rodgers Washington, DC 13 December 2006 watch News Media Changes Satellite television and the expanding power of the Internet are not only changing the way news is delivered, but also the perception of what news is and the way journalists do

发表于:2019-01-11 / 阅读(97) / 评论(0) 分类 2006年VOA标准英语(十二月)

By Steve Herman Tokyo 29 May 2006 The World Bank is questioning the value of large-scale power-generation projects of the type it has funded in Africa and other parts of the developing world. Paul Wolfowitz World Bank President Paul Wolfowitz is pre

发表于:2019-01-11 / 阅读(98) / 评论(0) 分类 2006年VOA标准英语(五月)

Pollster Dalia Mogahed 分享了一些关于埃及人对于阿拉伯之春的态度的令人意外的数据主要集中于女性在导致变革中起到的角色。

发表于:2019-02-05 / 阅读(132) / 评论(0) 分类 TED公开课:告女性说

10 Getting The Lead Out 第十章 把铅撵出去 In the late 1940s, a graduate student at the University of Chicago named Clair Patterson (who was, first name notwithstanding, an Iowa farm boy by origin) was using a new method of lead isotope measur

发表于:2019-02-17 / 阅读(70) / 评论(0) 分类 万物简史