科学家解开了一个为时甚久的谜团，他们发现人类心脏在人的一生中不断地产生新的心肌细胞，尽管新细胞产生的速度随年龄增长而放缓。
Solving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, although the rate of new cell production slows with age.
科学家解开了一个为时甚久的谜团，他们发现人类心脏在人的一生中不断地产生新的心肌细胞，尽管新细胞产生的速度随年龄增长而放缓。
Solving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, although the rate of new cell production slows with age.
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