VOA慢速英语2014.09.19
[audio]http://sound.yywz123.com/tingbbs/voa/voa20140919.mp3[/audio]________________________________ Harvard University's Lee Rubin predicts human testing could begin in as little as three years. 哈佛大学的Lee Rubin预计人类试验最快可能在三年内进行.
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