countdownKK [ˋkaʊˏntdaʊn] /ˈkaʊˌntdaʊn/名詞1倒數計時、倒數The crowd joined in the countdown to the New Year.群眾一起為新年倒數計時。2倒數計時階段、最後準備期The countdown to the election has already begun.選舉的倒數計時階段已經開始了。3發射倒數、倒數程序航太Engineers halted the countdown ten seconds before liftoff.工程師在升空前十秒中止了發射倒數。