Lost youth will never return.

青春一去不复返。

youdao

Youth will soon be gone never to return. And it will be too late for you to go into scholarship when in your declining years.

少年是一去不复返的，等到精力衰时，努力做学问也来不及了。

youdao

Youth will soon be gone never to return. And it will be too late for you to go into scholarship when in your declining years.

少年是一去不复返的，等到精力衰时，努力做学问也来不及了。

youdao