in a heartbeat片语KK [ɪn ə ˋhɑrtˏbit] /ɪn ə ˈhɑɹtˌbit/发音片语1毫不犹豫、立刻、马上口语If they offered me that job, I would take it in a heartbeat.如果他们给我那份工作,我会毫不犹豫地接受。2一瞬间、转眼间Everything can change in a heartbeat after one phone call.一通电话之后,一切都可能在一瞬间改变。用这个字练口说→