VOA慢速英语2014.09.17
[audio]http://sound.yywz123.com/tingbbs/voa/voa20140917.mp3[/audio]___________________________________ But the researcher says the protein is not a "fountain of youth." He says the aim of the research is not to lengthen life as much as to improve it. 但是,研究人员表示该蛋白质并非"青春泉".他表示研究的目的并非延年益寿而是改善机体.
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