When the heart contracts it generates a pulse or energy wave that travels through the arteries.

当心脏收缩时产生一次脉搏或能量波，它通过动脉传播。

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When the heart contracts it generates a pulse or energy wave that travels through the arteries.

当心脏收缩时产生一次脉搏或能量波，它通过动脉传播。

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