The bridge construction process is the chancephenomenon. Working operation occurrence and its duration are the random probability distribution model too.
桥梁施工过程是一种随机现象，工序发生和持续时间亦是随机概率分布模型。
2
That would make the brain unpredictable but not actually random, because the butterfly effect is a phenomenon of physical laws that do not depend on chance.
这使得大脑无法预测但是又不是完全随机进行，因为蝴蝶效应是物理法则中一个稀有的现象，它不遵循几率。
3
This kind of phenomenon was not by chance. It had very complex causes. This paper covered following aspects.