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
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Фото: Анастасия Березина / РИА Новости，详情可参考同城约会
if (isReleasable())，这一点在雷电模拟器官方版本下载中也有详细论述