in the event

基本解释

But they asked him to telephone them in the event of need.
但他们告诉他在万一需要的时候打电话给他们。
In the event (that) our team wins, there will be a celebration.
如果我队获胜，我们将庆祝一番。
《新英汉大辞典》
Yet in the event she did better than expected, winning just over 50% of the votes.
然而，在这次活动中，她的境况好于预期，刚好赢得超过50%的投票。

Masses of these monocytes leave the spleen in the event of an injury like a heart attack, wound,or infection.
I also talked last time about smallpox and the perceived need to produce more smallpox vaccine in the event that smallpox is used as a weapon in 2002.
上次我也谈论过了天花,以及在二零零二年天花被当作武器使用时,制造出更多天花疫苗的必要性
耶鲁公开课 - 生物医学工程探索课程节选
Use this pattern whenever you want to find out about the timing of an event in the past, present, or future.
当你想知道过去、现在或者未来某件事发生的时间时，你都可以使用这个句型。
When 课堂 - SpeakingMax英语口语达人

And in the event of such an occurrence taking place, that presents a great risk.
NPR: New Gaza Agreement Met with Cautious Optimism