It's no use crying over spilt milk.

为洒了的牛奶哭泣是没有用的。/覆水难收。

I know it's no use crying over spilt milk.

为洒了的牛奶而哭泣是没有用的（覆水难收）。

It's no use crying over spilt milk, anyway.

不管怎样，作无益的后悔是没有用的。

Try to find some remedies. It's no use crying over spilt milk.

牛奶倒了，哭也于事无补。该成语用作去安慰人不要作无益的懊悔。例。