Each heartbeat has two basic parts: diastole and atrial and ventricular systole.

每一次心脏跳动都包含两个基本部分：舒张期以及方式收缩期。

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Each heartbeat has two basic parts: diastole and atrial and ventricular systole.

每一次心脏跳动都包含两个基本部分：舒张期以及方式收缩期。

youdao