countdown
n. 倒计时，倒数读秒；临近时期；倒计时显示器
复数 countdowns
例句
The countdown has begun for the launch of the space shuttle.
航天飞机发射前的倒计时已经开始。
《柯林斯英汉双解大词典》
There's one thing that all New Year's Eve parties have in common: the countdown to midnight.
所有的除夕夜派对都有一个共同点：午夜倒计时。
The countdown has begun.
倒计时已经开始。
