单词:tetrarooseveltite
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VOA Learning English presents Americas Presidents. Today we are talking about Franklin Delano Roosevelt. He was related to an earlier president with same last name, Theodore Roosevelt. Many Americans call Franklin Roosevelt by the first letter of eac
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
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
By Cathy Majtenyi Nairobi, Kenya 06 December 2007 Kenya's capital, Nairobi, is home to one of Africa's largest dumpsites. A recent United Nations study found that nearly half of the children surveyed who live near the dumpsite suffer from serious med
Shortly after her seventh birthday, Eleanors life suddenly changed. When she was a child, many of the medicines we have today had not yet been discovered. Many diseases that now can be cured often killed people. One such disease was diphtheria. Peopl
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