名词
中文翻译：扳机开关
同义词：
['switch', 'handle', 'knob']
例句：
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1.The old man had a cocked switch on his door.
老人的门上有个扳机开关。
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2. The car's cocked switch was the only thing that worked.
这辆车的扳机开关是唯一起作用的东西。
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3. He quickly cocked the switch and turned off the light.
他迅速扳动开关，关掉了灯。