smoke alarm
smoke alarm — 名詞
1. a safety device mounted on a ceiling or wall that produces a piercing beep when
煙霧警報器
偵測煙霧並發出警報的裝置
a safety device mounted on a ceiling or wall that produces a piercing beep when it detects smoke, warning people inside a building to get out because there may be a fire
The smoke alarm in the kitchen went off when Michael burned the toast.
Michael 烤焦了吐司，廚房裡的煙霧警報器響了起來。
go off — phrasal verb for alarm activation
Beatrix replaced the battery in the smoke alarm every spring.
Beatrix 每年春天都會更換煙霧警報器的電池。
replace the battery — routine maintenance collocation
A loud beep from the smoke alarm woke the hostel residents at 3 a.m.
凌晨三點，煙霧警報器的一聲大響吵醒了宿舍裡的住客。
inanimate subject: a beep from the alarm as the agent
Paloma tested the smoke alarm by pressing the button until it beeped.
Paloma 按下按鈕直到它發出嗶聲，藉此測試煙霧警報器是否正常。
Building rules require a working smoke alarm on every floor of the apartment block.
建築法規要求公寓大樓的每一層樓都必須安裝正常的煙霧警報器。
collocation: a working smoke alarm / fire alarm
- the smoke alarm went off
- test the smoke alarm
- replace the smoke alarm battery
- a working smoke alarm
- install a smoke alarm
- smoke detector
more common in British English; emphasises the detection function rather than the warning sound
- fire alarm
broader term that can include heat detectors and manual pull stations; often used for the whole building alert system
- fire detector
more technical term, less common in household settings
文法句型
usually [a/the + ~]
用法筆記
Frequently appears with the phrasal verb 'go off' (the alarm activates because it detects smoke). The opposite — an alarm that fails to activate — is described as 'failed to go off' or 'did not go off'.