He could hear the beat of his heart.

他能听到自己的心跳。

《柯林斯英汉双解大词典》

The squiggly outline at the lower left is the section of myocardial cells, which makes the heart beat.

左下方那片弯弯曲曲的轮廓就是心肌细胞的切面，它们使心脏跳动。

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When the child caught sight of the hut at last, her heart began to beat.

当那孩子终于看到那间小屋时，她的心开始狂跳起来。

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Some of them have to do with merely digesting food and moving the body around, and making the heart beat,and the lungs open and close.

有一些只负责消化食物或者身体活动，让心脏跳动，让肺部呼吸。

耶鲁公开课 - 死亡课程节选

So, there's a continuum of electrical connection in the heart that allows an action potential to sweep across the surface of the heart and for the heart to beat in a coordinated fashion.

所以 心脏细胞有电偶联的连结组织,以使动作电位平稳在细胞表面传递,保证心脏的协调性跳动

耶鲁公开课 - 生物医学工程探索课程节选

Scientists have measured electrical signals from the beat of heart muscle cells and reconstructed the pattern on a computer.

BBC: Computer heart to beat disease

This is a potentially deadly condition in which the individual chambers of a heart beat out of phase with each other.

ECONOMIST: Model behaviour

Ms. SIMONE: (Singing) Just a beat of my poor heart in the dark.

NPR: A Posthumous 'Soul of Nina Simone'