back in the days
成語所屬單字day
back in the days — 慣用語
1. At a particular time in the past.
1.慣用語
釋義
在那些日子裡
At a particular time in the past.
例句
Back in the days when I was a student, I had more free time.
Back in the days of black-and-white TV, life seemed simpler.