water under the bridge

US /ˈwɔtər ˈʌndər ðə brɪdʒ/
UK /ˈwɔtər ˈʌndər ðə brɪdʒ/
"water under the bridge" picture
1.

过眼云烟, 过去的事

past events or issues that are no longer important or relevant, and should be forgotten

:
Their old argument is just water under the bridge now; they've moved on.
他们过去的争吵现在只是过眼云烟;他们已经翻篇了。
I know we had some disagreements, but that's all water under the bridge.
我知道我们有过一些分歧,但那都已经是过去的事了