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江山易改本性难移 
 
 
换汤不换药 
 
 
朽木不可雕也 
 
孺子不可教也 
烂泥糊不上墙 
猫改不了喝尿 
 
狗改不了吃屎 
 
死性不改 
 
 
 
 
A fox may grow grey, but never good.  
The wolf changes his coat, but not his disposition. 
A crow is never the whiter for washing herself. 
The leopard cannot change his spots. 
汉语英语有很多条,你选一条,总有一条合适的。 
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