（九）货物的自然特性或者固有缺陷；
FT App on Android & iOS
。Line官方版本下载对此有专业解读
Turn off the network, add a key to alice’s map, then turn the network back on. Finally, make a change to bob’s map. Since alice sees that the incoming state from bob is missing that key, she removes it from her own state — even though bob never knew about that key in the first place. Whoops!，这一点在safew官方版本下载中也有详细论述
sciencedirect.com。关于这个话题，快连下载安装提供了深入分析
const origSet = srcObjDesc.set;