count down翻译中文是：倒数到零或规定的时间。
count down例句：
1、The countdown to Christmas starts here. Waiting for the terminal of the count down.现在开始圣诞节倒计时，城市路口倒计时显示对驾驶行为的影响分析。
2、There were three more things to do before countdown. 开始倒计时之前还有3件事要做。
3、The countdown has begun for the launch later today of the American space shuttle .美国航天飞机的发射已于今天晚些时候开始进入倒计时。
4、Assumed the publication and dissemination of the “ Countdown to 1999 ”, the United Nations Programme on Ageing newsletter.何赛·穆里尼奥的整个赛前访谈可以在切尔西电视台收看到，今晚6:30，欢迎准时收看《比赛倒计时》节目。
