His behaviour offends against the canons of good manners.

他的行为违背了礼法的准则.

《简明英汉词典》

" Let us not forget the proprieties due.

" 咱们别忘了礼法.

英汉文学 - 败坏赫德莱堡

We should respect ceremonial rites and regulations , but needn't blindly cling to them.

礼法要尊重, 但不能一味地死守.

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Rules of etiquette and the peoples livelihood thought were two important parts among his thinking system.

礼法思想和民生思想是他思想体系中的两个重要组成部分.

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