When tomorrow comes, this day will be gone forever.

当明天来临时，今天就永远成为过去。

youdao

Youth will be gone forever, and there'll be a day when you are too weak to learn.

少年是一去不复返的，等到精力衰时，要做学问也来不及了。

youdao

Youth will be gone forever, and there'll be a day when you are too weak to learn.

少年是一去不复返的，等到精力衰时，要做学问也来不及了。

youdao