an animating or vital unifying force; "New York is the commercial heartbeat of America"
the rhythmic contraction and expansion of the arteries with each beat of the heart; "he could feel the beat of her heart" 同义词：pulse, pulsation, beat,
a very short time (as the time it takes the eye to blink or the heart to beat); "if I had the chance I''d do it in a flash" 同义词：blink of an eye, flash, instant, jiffy, split second, trice, twinkling, wink, New York minute,
例句与用法
1.
Your heartbeat is quite normal . 你的心跳得很正常。
2.
From the sa node, electrical impulses spread through the heart muscle to trigger the heartbeat . 从窦房石结出来的电脉冲传播到心脏肌肉触发心脏跳动。
3.
A factor in determining the heartbeat of current research into combustion instability phenomena is the status of engine development program . 研究燃料不稳定性的规模，完全取决于发动机研制计划的状况。
4.
I ' m sure madam pomfrey will fix it in a heartbeat 庞弗雷夫人肯定一会儿就能治好
5.
It can also cause a dangerously abnormal heartbeat 还会导致危险的不正常断心跳。
6.
It can also cause a dangerously abnormal heartbeat 它也可以造成危险的异常心跳。
7.
This machine monitors the pressure and heartbeat 这部机器监视病人的血压和脉搏。
8.
What is rhythm of the heart , heartbeat and heart sounds 什么是心律、心率和心音
9.
It can also cause a dangerously abnormal heartbeat 同样会引起危险反常的心搏。
10.
It can also cause a dangerously abnormal heartbeat 还可能导致危险的心律紊乱。
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