Definition
at any single point or moment.
任何時候
This restaurant can only accommodate fifty customers at any one time.
這家餐廳在任何特定時間只能容納五十位顧客。
Due to limited space, the library only allows a certain number of students in at any one time.
由於空間有限，圖書館在任何特定時間只允許一定數量的學生進入。
During peak hours, the gym can get very crowded with many people at any one time.
在高峰時段，健身房在任何特定時間可能會非常擁擠，有很多人。