他们不知道也不关心电视是如何工作的、里面都存在那些组成要素，他们所做的只是通过输入（遥控器、电源等）和输出（屏幕和扬声器）来同电视进行互动。
They don't know or care about how the TV works or what components exist inside, only that they can interact with it via its inputs (remote control, power plug, etc.) and outputs (screen and speakers).
关灯请关闭电源开关，而不是仅使用遥控器将灯关闭。
Pls turn off the power, not only turn off the lights by the remote controller.
只要按遥控器上的“电源”键就行了。
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