:to count numbers in a reverse order from higher numbers to lower ones倒数
He counted down from 10 to 1.他从10倒数到1。
2
count down (something)alsocount (something) down:to pay close attention to the number of (days, miles, etc.) that remain until a particular moment or event is reached逆序计数;倒计时
He is counting down the days left in the school year. [=he is eagerly looking forward to the end of the school year]他在对本学年剩下的天数做倒计时。
We were counting down the miles as we approached our destination.当我们接近目的地时,我们就开始倒计路程。