You'd better measure the flow of water over the dam.

你们最好测量一下从堤坝上面流出的水量.

《简明英汉词典》

Let's forget about it, it's all water over the dam.

忘了那件事吧, 这已经无法挽回了.

《简明英汉词典》

Let our former problems be water over the dam , and let us look to the future.

我们之间过去的问题一风吹, 一切向前看.

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