VOA慢速英语2013.02.14
[audio]http://sound.yywz123.com/tingbbs/voa/voa20130214.mp3[/audio]Almost 500 researchers in 50 countries took part in the study of global disease and disability.来自50个国家的近500名研究人员参与了这项全球性疾病与无能力的研究.
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