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他一向嘴硬，从不认错。
[误] He has always got a hard mouth and never admit a fault.
[正] He never says uncle.
注：say (cry) uncle: to give up or in; to surrender; to admit defeat. Mainly used by boys, as when fighting。主要是男孩们打架时的用语，当一方想制服另一方时，就用命令的口气说：“Say uncle!”这时，有的孩子为了表示不服输，就是不说。后来，say uncle 就成了“服输”的代名词，而 not say uncle 就相当于“嘴硬”了。
[误] He has always got a hard mouth and never admit a fault.
[正] He never says uncle.
注：say (cry) uncle: to give up or in; to surrender; to admit defeat. Mainly used by boys, as when fighting。主要是男孩们打架时的用语，当一方想制服另一方时，就用命令的口气说：“Say uncle!”这时，有的孩子为了表示不服输，就是不说。后来，say uncle 就成了“服输”的代名词，而 not say uncle 就相当于“嘴硬”了。
