in the event that
US /ɪn ðɪ ɪˈvent ðæt/
UK /ɪn ðɪ ɪˈvent ðæt/

1.
萬一, 如果
if a particular thing happens
:
•
In the event that it rains, we will move the party indoors.
萬一下雨,我們就把派對移到室內。
•
You will be notified in the event that there are any changes to the schedule.
如果時間表有任何變動,您將收到通知。