Final Countdown倒计时;最后倒数;决赛倒计时;最后的倒计时
countdown period倒计时期
countdown timer定时器
Countdown widget倒计时软件
The countdown倒计时;澳门迎尚酒店;最终决战
countdown counter倒计时钟
Countdown Manager倒计时助手
Countdown Records倒计时唱片
Fatal Countdown逆时営救
N-SING（单数型名词） A countdown is the counting aloud of numbers in reverse order before something happens, especially before a spacecraft is launched. 倒计时 [also no det]
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。