Let bygones be bygones. Try to look on the bright side.

过去的就让它过去吧。试着往好的一面看吧。

youdao

Politicians are always going to let bygones be bygones - for the very good reason that voters expect them to think and talk about the future, not the past.

BBC: The Bank of England, the chancellor, and the target

It's one of the reasons Nelson was not in a let bygones be bygones mood yesterday when talking about Bilonog and doping.

NPR: Olympian Bestowed 9-Year-Old Gold Medal

In the end, it was decided to let bygones be bygones.

FORBES: Did Boris Berezovsky Kill Himself? More Compelling, Did He Kill Forbes Editor Paul Klebnikov?