The light switches are placed on the wall near the door.
电灯开关都设有靠门边的墙上。
Light switches in the plant room are all timer switches.
位于机房内的全部灯光开关器都装设了时间掣。
Instead, for most people, it switches on and off like a light switch.
相反，对于大多数人来说，它就像开关一盏灯一样。
Once all three switches are turned on (in order) the Main light will glow red.
一旦所有三个开关打开(按顺序)的主灯将发光红色。
The other two switches cannot light the light bulb.
其他两个开关不能让灯泡亮起。
The other two switches cannot light the light bulb.
其他两个开关不能让灯泡亮起。
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