Try to switch all the lights off in as few taps as possible.

你需要用最少的点击数来把所有的灯泡关闭。

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Before you start please be sure to switch off all the lights.

出发前请务必把所有的灯关掉。

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Before you start please be sure to switch off all the lights.

出发前请务必把所有的灯关掉。

youdao