Etiquette is a word describing the rules for acceptable behavior among members of a society.

礼仪是描述社会成员之间可接受的行为规则的一个词。

We know that they’re still holding Ukrainians essentially as hostages which is beyond any definition of acceptable behavior by a modern civilized state.

我们知道他们仍然把几个乌克兰人当作人质，现代文明国家绝对不会接受这样的行为。

What I mean is that our societal norms about who can marry whom generally tells us something about what we hold to be acceptable or taboo sexual behavior.

我的意思是，我们关于谁可以嫁给谁的社会规范通常会告诉我们一些我们认为可以接受或禁忌的性行为。