VOA慢速英语2014.09.15
[audio]http://sound.yywz123.com/tingbbs/voa/voa20140915.mp3[/audio]_____________________________________ Researcher Lee Rubin is a professor of stem cell research at Harvard's Stem Cell Institute. His team looked at the effect of GDF11 on brain tissue. 研究人员Lee Rubin是哈佛干细胞研究所从事干细胞研究的教授,他的团队查看了GDF11对脑组织的影响.
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