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 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。
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