请在离开前把电源关掉。
Please turn off the power before you leave.
请在离开前把电源关掉。
When leaving your room, please turn off the power switch and air-control to save energy.
离开客房时应关闭房间的电器和空调，以减少能源的消耗。
When it is not used, please turn the power switch off and switch off the power supply.
不使用时，请将电源开关关闭，并切断电源。
Please turn all the lights off as you leave the building; we can't afford to waste power.
离开时请将所有的灯关掉，我们浪费不起电。
Please turn off the electric power.
请把电源关掉。
Please turn off the electric power.
请把电源关掉。
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