As the saying goes — it's no use crying over spilt milk.

常言道：覆水难收，后悔也于事无补。

Now it's done, regrets are of no avail.; It's no use crying over spilt milk.

事已如此， 后悔也是枉然。

Please wipe up the spilt milk.

请把溅出来的牛奶擦干净。

Don't cry over the spilt milk.

——不要为打翻的牛奶而哭泣。

It's no use over spilt milk.

牛奶打翻了哭也没有用。