包围在心脏外面的肌肉墙，也就是心肌层，里面的电脉冲让心脏保持跳动。

Electrical impulses in the myocardium, the heart's muscular wall, keep your heart beating.

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例如，微型计算机在人们的身体保持他们的心脏的跳动。

For example, tiny computers inside people's bodies keep their hearts beating well.

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例如，微型计算机在人们的身体保持他们的心脏的跳动。

For example, tiny computers inside people's bodies keep their hearts beating well.

youdao