in the event

基本解释

But they asked him to telephone them in the event of need.
但他們告訴他在萬一需要的時候打電話給他們。
In the event (that) our team wins, there will be a celebration.
如果我隊獲勝，我們將慶祝一番。
《新英漢大辤典》
Yet in the event she did better than expected, winning just over 50% of the votes.
然而，在這次活動中，她的境況好於預期，剛好贏得超過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.
上次我也談論過了天花,以及在二零零二年天花被儅作武器使用時,制造出更多天花疫苗的必要性
耶魯公開課 - 生物毉學工程探索課程節選
Use this pattern whenever you want to find out about the timing of an event in the past, present, or future.
儅你想知道過去、現在或者未來某件事發生的時間時，你都可以使用這個句型。
When 課堂 - SpeakingMax英語口語達人

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