夜间请务必把所有的灯关掉。

Please ensure that all the lights are switched off at night.

youdao

出发前请务必把所有的灯关掉。

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

youdao

出发前请务必把所有的灯关掉。

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

youdao