This is the VOA Special English Education Report. A question from the West Bank: Zuheir Khlaif wants to know how American schools use educational technology. There is not a simple answer. It depends on the subject and level of students, of course. Bu

发表于:2018-12-01 / 阅读(162) / 评论(0) 分类 VOA慢速英语2009年(十二)月

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 Challiss McDonough Cairo 21 March 2006 Egypt says it might have its third human case of bird flu. A woman has preliminarily tested positive for the virus, but further tests are being run to confirm

发表于:2019-01-13 / 阅读(118) / 评论(0) 分类 2006年VOA标准英语(三月)

By Lisa Bryant Paris 19 July 2006 Europe is baking under a heat wave that has sent temperatures soaring past 36 degrees Celsius in some places. The sizzling weather is blamed for the deaths of at least half a dozen people. But from a very hot Paris,

发表于:2019-02-06 / 阅读(112) / 评论(0) 分类 2006年VOA标准英语(七月)

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(71) / 评论(0) 分类 万物简史