名词
中文翻译：Unknown
同义词：
['main switch', 'master controller']
例句：
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1. The main switch controls the power to all the lights in the room.
主开关控制着房间内所有灯的电源。
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2. The master controller is responsible for monitoring and controlling the entire system.
主控器负责监控和控制整个系统。
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3. The main switch is located on the wall next to the door.
主开关位于靠近门的墙上。