He set at naught all his parents'good advice.

他对父母的忠言劝告一概置之不理.

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Henceforward all my doubts and fears are set at naught for ever.

我的疑惑与恐惧自此以后都永远受蔑视.

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He set at naught all my good advice.

他完全不把我的一切忠告放在心上.

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All our victories are set at naught if we lose sight of our principles.

如果我们忘记原则,所有的胜利都等于零.

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