警報器
けいほうき
alarm (fire, burglar, railroad-crossing, etc.); sensor
Common word
Meanings
Noun
alarm (fire, burglar, railroad-crossing, etc.); sensor
Example sentences
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If there is a big earthquake, the alarm will sound.
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Don't go onto the railroad crossing when the alarm starts going off.
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The alarm was heard ringing at an early hour on the second floor.
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Don't cross the tracks when the alarm is ringing.