VOA标准英语2016.06.25
[audio]http://sound.yywz123.com/tingbbs/voab/voab20160625.mp3[/audio]And Bolli says there was a significant improvement in the ability of the stem cell recipients to exercise. The study participants also got MRI scans before and after treatment. _______________________________. The reduction of the scar implies that new heart muscle is being produced to replace that scar. And so it is evidence that the stem cells are regenerating new heart muscle. This ongoing5 study is very small, with just 16 patients in the stem cells group, plus seven more in the control group.
罗伯特还说，注入了干细胞的心脏病患者，心肌能力有显著提升。参加该研究的患者在治疗前后都进行了磁共振成像。________________________________。疤痕减少的事实表明患者生成的新心肌代替了疤痕处的坏死心肌。所以这证明干细胞可以再生新心肌。这项研究规模较小，目前干细胞实验组仅有16名患者，实验对照组还有7名患者。
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