紧急需要

例句：

1. 1.The fire department arrived at the scene of the accident within 30 minutes of the emergency call.
   消防部门在接到紧急电话后30分钟内赶到了事故现场。
2. 2.The doctor advised her to rest and not to worry about the emergency situation.
   医生建议她休息，不要担心紧急情况。
3. 3.The company had to cancel all flights due to an emergency situation in the air traffic control system.
   由于空中交通控制系统出现紧急情况，公司不得不取消所有航班。