1.緊急情況     n.

In an emergency, don't forget to call 119 immediately.

遇到緊急情況，別忘了立刻撥打119。

2.突然事件 n.

A chemical pollution spreads around our school campus. It is an emergency.

化學污染散播校園內，是一件突發事件。

3.突發事件 n.

Fortunately, no one got seriously hurt in this emergency.

幸運地，此次突發事件沒有人受到嚴重傷害。