That guy is more than stupid. He's a dyed - in - the - wool ignoramus.

那家伙岂止愚蠢,他简直是彻底无知.

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He is a dyed - in - the - wool reactionary – there is no changing his opinions.

他是 彻头彻尾 的反动分子——没法改变他的看法.

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My parents are dyed - in - the - wool traditionalists.

我父母是根深蒂固的传统主义者.

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