fire alarm
英
['faɪə ə'lɑːm]
美
[faɪr ə'lɑːrm]
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Noun:
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a shout or bell to warn that fire has broken out
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an alarm that is tripped off by fire or smoke
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用作名词 (n.)
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The smoke activated the fire alarm.
烟雾了触发了火警报警器。
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Smoke sensors warned us of the fire.
烟雾探测器已向我们发出火警警报。
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