VOA标准英语2016.06.23
[audio]http://sound.yywz123.com/tingbbs/voab/voab20160623.mp3[/audio]A stem cell treatment for patients experiencing heart failure significantly improved their heart function in a small but promising new study. In heart failure, the heart loses its ability to efficiently pump blood. It is most often caused by a heart attack, _______________________________. In this new study, patients were injected with adult stem cells taken from their own hearts. These are a special kind of undifferentiated cell found throughout the body that helps to maintain and repair the tissue in which they are found.
一则新的研究显示，对心力衰竭患者采用干细胞治疗法可极大提升患者的心脏功能，前景广阔。所谓心力衰竭，就是心脏泵血功能失效。心力衰竭通常是由心脏病发作造成，_______________________________。在这则新研究中，患者被注入了自己的心脏干细胞。这些取自患者身体各处的干细胞，彼此之间并无差异，但其特殊性在于可以帮助患者维护并修复其同源组织。
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