heartbeat
US
UK heartbeat n: uncountable (heart: pulsing)
SC 心跳 xīn tiào
SC 心脏的跳动 xīn tiào，xīn zàng de tiào dòng
It was so quiet in the room I could hear my heartbeat.
房间里非常安静，我都能听到自己的心跳。
heartbeat n: countable (heart: single pulse)
SC 一次心跳
Just when I thought he was dead I felt a heartbeat.
就在我以为他死了的时候，我感觉他的心跳了一下。
heartbeat n: figurative (driving force) (指驱动力)
SC 心脏，心跳 xīn zàng ，xīn tiào
TC 心臟
TC 心臟
For twenty years, he was the heartbeat of this small community.
in a heartbeat adv: figurative (very rapidly)
SC 立刻，瞬间 lì kè，shùn jiān
TC 立刻，瞬間
TC 立刻，瞬間