狗ㄍㄡˇgǒu改ㄍㄞˇgǎi不ㄅㄨˋbù了ㄌㄧㄠˇliǎo吃ㄔchī屎ㄕˇshǐ

  1. （諺語）​比喻惡習不改，劣性難移。如：「他這個人沒救了！真是狗改不了吃屎！」

英lit. a dog can't stop himself from eating shit (idiom)​, fig. bad habits are hard to change

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