我在检查烟雾侦测器，以防发生火灾。
I'm checking the smoke detectors just in case there is a fire.
每天都有儿童因为缺乏简单的科技而死亡，例如烟雾侦测器、脚踏车头盔、及汽车安全座位。
Every day, children die for want of simple technology such as smoke detectors, bicycle helmets, and car safety seats.
也可作为食品烟雾剂中的压缩气体和漏出物侦测器。
It is also used as a propellant in food aerosols and as a leak detector.
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