When the end of the countdown is reached, the 120 Volt must not be applied anymore to start a cycle. If not, the countdown will restart.

在倒数记秒末点，切勿再用120伏(电压)启动循环，否则倒数计秒将重启。

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It was the countdown for Apollo Eleven the space flight that would carry men to the first landing on the moon.

VOA: special.2009.07.15

The countdown reached zero just as Frank Borman and James Lovell, in Gemini Seven, passed overhead.

VOA: special.2009.07.01

The countdown at Cape Canaveral reached zero as Gemini Seven passed overhead.

VOA: special.2009.07.01

Countdown host Keith Olbermann clawed into this category long before Maddow entered the fray.

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In 2004, I sat backstage with Ben Roethlisberger and his family as draft countdown began.

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WBGO's Josh Jackson hosts the countdown to 2009, central time (with help from WWNO).

NPR: Toast Of The Nation Swings Into 2009