烟雾触发了火警报警器。
The smoke sets off the fire alarm.
《柯林斯英汉双解大词典》
谁拉响了火警报警器？
Who set off the fire alarm?
《牛津词典》
The smoke activated the fire alarm.
youdao
我正走近办公室，这时火警报警器响了。
I was coming close to the office when the fire alarm sounded.
人们认为火警报警器响是个恶作剧。
It was thought that the fire alarm had been set off as a prank.
就在那时，火警报警器突然发生巨响。
Just then, the fire alarm went off.
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