fire alarm
noun /ˈfaɪər əlɑːm/
  /ˈfaɪər əlɑːrm/
 - a bell or other device that gives people warning of a fire in a building火警钟;火警报警器 - Who set off the fire alarm?谁拉响了火警报警器? 
- It was thought that the fire alarm had been set off as a prank.人们认为火警报警器被拉响是个恶作剧。 
- The fire alarm went off when I was making a coffee.我正在煮咖啡的时候火警报警器响了。 
 Collocations Dictionaryverb + fire alarm- set off
- install
 - go
- go off
- sound
- …
 - system
 
- Who set off the fire alarm?
- an occasion when a fire alarm goes off火灾警报器: 火灾警报器熄灭的场合- We had a fire alarm at work this morning.今天早上我们工作时有火警。 
 
- We had a fire alarm at work this morning.