water over the dam
无法挽回的过去
A:Look, it's all water over the dam now. Let's leave it behind us.
A:看，一切都已无法挽回，就别再多想了。
B:Yeah, I know, but it's too hard to do.
B：对，我知道，但很难做到。
A:Our eyes should look into the future. We couldn't live in the past.
A：我们的目光应投向未来，不能活在过去中。
B:Only sometimes when I think about it. I feel very sad.
B：只是有时我一想起来就感到难过。
A:It's normal. Time will change everything.
A：很正常，岁月会改变一切。