但是，和机械泵以及人造心脏一样，干细胞疗法对于治疗心脏病来说也是一种高技术、高成本的解决方案。
But like mechanical pumps and artificial hearts, stem cell therapy is a high-tech, high-expense solution for dealing with heart diseases.
但是当他们注射干细胞进入大鼠心脏，细胞死了，研究者在自然生物技术杂志中报道。
But the cells died when they injected them into the hearts of the rats, the researchers reported in the journal Nature Biotechnology.
但是当他们注射干细胞进入大鼠心脏，细胞死了，研究者在自然生物技术杂志中报道。
But the cells died when they injected them into the hearts of the rats, the researchers reported in the journal Nature Biotechnology.
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