protocol
noun uk/ˈprəʊ.tə.kɒl/ us/ˈproʊ.t̬ə.kɑːl/
(RULES)
[ U ]礼仪，礼节
the system of rules and acceptable behaviour used at official ceremonies and occasions
a breach of Royal protocol 对皇家礼仪的违反
diplomatic protocol 外交礼仪
(AGREEMENT)
[ C ]（正式的国际性）条约，公约，议定书
a formal international agreement
The Geneva Protocol of 1925 prohibits the use of poisonous gases in war. 1925年通过的《日内瓦公约》禁止在战争中使用有毒气体。
(IN COMPUTING)
[ C ] computing specialized规程，协议（计算机之间交换信息的计算机语言）
a computer language allowing computers that are connected to each other to communicate