Her behaviour showed a total lack of common decency.

她的举止显示她连起码的礼节都不懂。

《牛津词典》

It is common decency to give your seat to anyone in greater need.

把座位让给更需要的人是起码的修养。

《柯林斯英汉双解大词典》

Common decency would prohibit me from doing so.

礼仪禁止我这样做。

youdao

Indeed, common sense and common decency would have demanded better disclosure of the novelty of this treatment.

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What ensues may be against the law, but it goes no more against the grain of common decency than any other tool of your trade.

NEWYORKER: Hack Work

These actions violate international norms and every standard of common decency.

WHITEHOUSE: President Obama on the Situation in Libya