名词
中文翻译：点火开关
同义词：
['ignition switch', 'starter switch']
例句：
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1. The car's engine will not start unless the firing switch is turned off.
除非点火开关关闭，否则汽车引擎不会启动。
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2. The engineer had to replace the faulty firing switch on the machine.
工程师不得不更换机器上故障的点火开关。
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3. The new model has a more convenient firing switch for easy starting.
新款模型有一个更便于启动的点火开关。