count down

漢語翻譯

倒讀數, 用倒數方式計算
【經】 倒數, 遞減計算

英文解釋：

名詞 count down:

1. counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle)
   同義詞：countdown

動詞 count down:

1. count backwards; before detonating a bomb, for example