There's nothing you can do about it.

这事一点儿办法都没有。

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今天的几个句子是有关失望的：1.What a disappointment! 真让人失望！2.This is disappointing.这真令人扫兴。3.No, he led me on a wild-goose chase. 没有，白费了半天劲。4.Yeah, you let me down. 是啊，我很失望。