a warning that is given about something that fails to occur
A false alarm, also called a nuisance alarm, is the fake report of an emergency, causing unnecessary panic and/or bringing resources (such as emergency services) to a place where they are not needed. False alarms may occur with residential burglary alarms, smoke detectors, industrial alarms, and in signal detection theory.
例句与用法
1.
Mr. allen was shaken up by the false alarm . 艾伦先生被假警报搞得心神不宁。
2.
It turned out to be false alarm . 其结果证明是虚惊一场。
3.
The rumors of a petrol shortage turned out to be a false alarm . 汽油短缺的谣传原来是一场虚惊。
4.
All the air raid warnings, without exception, had been false alarm . 所有空袭预告--毫无例外--都是虚假警报。
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