Smoke detector
01
烟雾探测器, 火灾报警器
a device that detects smoke and gives a warning
例子
I forgot to replace the battery in the smoke detector, so it was n't working properly.
我忘了更换烟雾探测器的电池，所以它没有正常工作。
The landlord installed a new smoke detector in the rental apartment.
房东在出租公寓里安装了一个新的烟雾探测器。
