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。Diplomatic politesse has been thrown aside;that happens during war.外交礼节被弃置一旁，这类事情在战时常有发生。He understands about diplomatic etiquette.他熟知外交礼节。They did not follow the proper diplomatic protocols.他们没有遵守恰当的外交礼节。