名詞 heartbeat:

1. the rhythmic contraction and expansion of the arteries with each beat of the heart
   同義詞：pulse, pulsation, beat
2. a very short time (as the time it takes the eye blink or the heart to beat)
   同義詞：blink of an eye, flash, instant, jiffy, split second, trice, twinkling, wink, New York minute
3. an animating or vital unifying force

1. Although there was still a faint heartbeat, he was to all intents and purposes dead.
   他雖然仍有隱隱心搏，但從身體各方面看已經(jīng)死亡。
2. An irregularity in the force or rhythm of the heartbeat.
   心律失常不規(guī)則的心跳強度或節(jié)奏

heart.beat

n.（名詞）
A single complete pulsation of the heart.
心搏：一次完整的心臟跳動
A vital force or driving impulse:
重要的力量或推動力：
例句：
Broadway is the heartbeat of the New York City theater world.
百老匯是紐約戲劇界的中心