You look dirty. Go and have a wash.

你显得很脏. 去洗一洗.

辞典例句

This cotton - padded gown is too dirty, and should have a wash.

这件棉袍太脏了, 应该洗洗了.

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I must have a wash first.

我先得洗一洗.

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Have a wash before meals, please.

饭前请洗一洗.

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