the set of rules or customs that control accepted behaviour in particular social groups or social situations礼仪,礼节;规范,规矩
Social etiquette dictates that men cannot sit while women are standing.(社交)礼仪要求在女士站立时,男士不能入座。
Diplomatic etiquette forbids calling for the death of a national leader.外交礼节禁止公开要求处死国家领导人。