占优均衡是指不论其他参与者做何种策略选择，每个参与者的最佳策略都是唯一的，其结果为占优均衡。
第三，模型通过使用风险占优机制来解决博弈结果存在多重纳什均衡的问题，从而选择出最佳应急物资调度方案；
Thirdly, the model solves the problem that multiple Nash equilibrium occurs in the game results by risk-dominant mechanism, and then the optimal solution could be obtained.
然而现在已经变为右旋占多数的蜗牛种类，其旋向性（壳的螺旋方向）一度也曾均衡分布，在某些种类中，甚至左旋曾占优势。 。
Butt at one time, handedness (twist direction of the shell) was equally distributed within some snail species that have become predominantly dextral or, in a few species, predominantly sinistral.
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