it is a wise father that knows his
再聪明的父亲也不知道自己的孩子
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It is a wise father that knows his child.
即使做父亲的也不一定了解自己的孩子。
youdao
It is a wise father that knows his own son.
再聪明的父亲，也不见得了解自己的儿子。
It is a wise father that knows his own child.
再聪明的父亲都不见得完全知道自己的儿子。
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