单词：alarm signal
[化] 警报信号
alarm signal的用法和样例：
例句
- An air-raid alarm sounded in the depths of night.深夜响起了空袭警报。
- I raised the alarm as soon as I saw the smoke.我一看见冒烟就发出警报。
- Expert regard it as a warning signal of an economic smashup.专家们把它看作是一场经济灾难的警告信号。
- By smacking his tail fiat on the top of the water he can also make a loud warning signal when enemies are spotted.当发现有敌人时，它可以靠拍击平放在水面上的尾巴来发出响亮的警告信号。
- So they had bypassed the warning signal.因此他们没有让警报信号系统起作用。
- Acoustic, optical alarm signals and identifying ind.船舶声光报警信号和识别标志。
- Alternative warning arrangements must be made if the noise from the work is likely to mask existing alarm signals.如果作业产生的噪音可能淹没发出的报警信号时，则必须采取另外的报警措施。
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