There are four emergency exits in the department store.
这家百货公司有四个紧急出口。
It is important to keep/stay calm in an emergency.
在紧急情况下保持镇静是很重要的.
None of us had seen an emergency like this and we were all flying by the seat of our pants.
我们谁都没有遇到过这种紧急情况, 只好凭感觉驾驶飞机。