you never know

US /juː ˈnev.ər noʊ/
UK /juː ˈnev.ər noʊ/
"you never know" picture
1.

你永远不知道, 谁知道呢

used to say that something unexpected might happen, so you should not give up hope or assume something will not happen

:
It might rain later, you never know.
可能晚些时候会下雨,你永远不知道
He might still show up, you never know.
他可能还会出现,你永远不知道