Definition: when something happens, or in preparation for when something happens Level: B1
我们在后台放了一桶水，以防火灾。
We keep a bucket of water backstage, ___in ___case ___of fire.
这是关于如何在事故或自然灾害发生时救援人们的。
It is about how to rescue people ___in ___case ___of an accident or a natural disaster.
总是备有急救箱，以防紧急情况。
Always have a first aid kit ___in ___case ___of emergencies.
