Associativity: when merging three (or more) states, it doesn’t matter which are merged first; (A ∨ B) ∨ C = A ∨ (B ∨ C). If Alice receives states from both Bob and Carol, she can merge them into her own state in any order and the result will be the same.4
Edition mechanism and technically it’s indeed basically that.
，更多细节参见51吃瓜
looks kinda weird
[76]总流通人次是指本年度内到图书馆场馆接受图书馆服务的总人次，包括借阅书刊、咨询问题以及参加各类读者活动等。