countdown
🇺🇸
/ˈkaʊntdaʊn/
🇬🇧
/ˈkaʊntdaʊn/
counting numbers backwards to zero, like before a rocket launch
The countdown for the rocket launch started at ten seconds.
火箭发射的倒计时从十秒开始。
the time just before something big happens
The countdown to the concert made everyone excited.
音乐会倒计时让每个人都兴奋不已。