The cooperative solution newly explained and defined is in fact a Nash Equilibrium in nature, which is stable both internally and externally.
重新解释界定的合作解，本质上是具有内外稳定性质的一种纳什均衡。
In section 2.4 and 2.5, we show that the system (1.1)-(1.4) is externally and internally stable, respectively.
在第四节和第五节我们分别讨论系统（1.1）-（1.4）的外部稳定性与内部稳定性；
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