Definition
This idiom is used to express that a negative outcome cannot be changed or reversed.
為時已晚，覆水難收
I should have read the terms carefully before signing the contract, but now it's too late, the damage is done.
我應該在簽署合約之前仔細閱讀條款，但現在已經太遲了，情況已無法挽回。
By the time they realized the error, all the products had already been shipped; the damage was done and the loss was unavoidable.
當他們發現錯誤時，所有產品已經發貨；情況已無法挽回，損失不可避免。
She shouldn't have done the presentation without preparation, but now she is already embarrassed, the damage is done.
她不應該在沒有準備的情況下做簡報，但現在她已經尷尬了，情況已無法挽回。