by and by

US /baɪ ən ˈbaɪ/
UK /baɪ ən ˈbaɪ/
"by and by" picture
1.

迟早, 不久

eventually; after a period of time

:
The sun will come out by and by.
太阳迟早会出来。
We'll get there by and by, don't worry.
我们迟早会到那里的,别担心。