单词：tetradecene
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Top 5 Songs for Week Ending Dec. 10 Were coming to grips with the five most popular songs in the Billboard Hot 100 Pop Singles chart, for the week ending December 10, 2016. Its been an active week, with two of our Top Five positions seeing newcomerst
VOA标准英语2016年(十二月)
This is the Top Five Countdown! Were on the march with the five most popular songs in the Billboard Hot 100 Pop Singles chart, for the week ending Dec. 9, 2017. If you feel your week isnt complete without a new song in the hit list, then youll be hap
VOA标准英语2017年(12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
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
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A group of UK aid agencies has launched a joint fund-raising appeal to help more than 10 million people affected by severe drought in the Horn of Africa. Thousands of families in desperate need of food and water have trekked for days from Somalia to
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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
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