Definition
If a particular situation occurs as described or anticipated.
如果那样，在那种情况下
There's a possibility of my flight being delayed. In that event, I'll phone to let you know.
我的航班有可能会延误。如果发生那种情况，我会打电话通知你。
I was prescribed an anti-inflammatory that could potentially take care of my pain. In that event, I won't need the surgery.
医生给我开了一种消炎药，可能可以缓解我的疼痛。假使那样的事情发生，我就不需要做手术了。
There is a distinct possibility of the firm going bankrupt, and in that event, the family could lose everything.
这家公司很有可能会破产，如果发生那种情况，这个家庭可能会失去一切。