alarm signal

• 警报

alarm signal的用法和样例：

例句

1. An air-raid alarm sounded in the depths of night.
   深夜响起了空袭警报。
2. I raised the alarm as soon as I saw the smoke.
   我一看见冒烟就发出警报。
3. 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。
4. 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。
5. So they had bypassed the warning signal.
   因此他们没有让警报信号系统起作用。
6. Acoustic, optical alarm signals and identifying ind.
   船舶声光报警信号和识别标志。
7. 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。