动词短语
中文翻译：倒数计时
同义词：
['downfall', 'count-off', 'count-up']
例句：
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1. The countdown to the big event has begun.
大事件的倒计时开始了。
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2. They counted down the seconds until the clock struck midnight.
他们倒数计时直到钟敲了午夜。
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3.The countdown for the new moon festival was starting.
新月节的倒计时开始了。