单词：vitro-
n. 体外；试管内
[网络] 在体外试管实验；玻璃；体外研究
[网络] 在体外试管实验；玻璃；体外研究
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60秒科学
They are only a few weeks old, but these octuplets are already the center of public outrage. Los Angeles police say they plan to investigate death threats against their mom, Nadya Suleman. The 33-year-old single, unemployed mother has been getting hu
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万花筒2009年
万花筒2009年
Voice 1 Welcome to Spotlight. Im Liz Waid. Voice 2 And Im Joshua Leo. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 Imagine that you are sitting down to
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环球英语 Spotlight