紧急警报

例句：

1. 1. Thepolice were called to the scene of the accident because it was an emergency.
   警察被叫到事故现场，因为这是一个紧急情况。
2. 2. The doctor advised him to seek medical attention immediately in case of an emergency.
   医生建议他立即寻求医疗帮助，以防万一发生紧急情况。
3. 3. In an emergency, we should always have a plan B ready.
   在紧急情况下，我们应该总是有备选方案。