来自《耶鲁大学开放课程：博弈论 第11集 第11集》

• 
  
  So let's see what it says again,
  我们再来看一下
• 
  
  it says ? is evolutionarily stable if it's a Nash Equilibrium,
  它实际是在说如果?是进化稳定策略
• 
  
  that's basically this
  显然它也是纳什均衡
• 
  
  and if it's only a weak Nash Equilibrium, there's a tie,
  如果它只是弱纳什均衡 即出现平局
• 
  
  then it better beat up on the mutant.
  那么它的收益必须比突变个体要高
• 
  
  It better beat up on the mutant when it meets the mutant.
  当它遇到突变个体时要赢才行
• 
  
  I'm going to try and give you an intuition as to
  过一会我再告诉大家
• 
  
  why this is true in a minute,
  为什么要满足这些条件
• 
  
  but first I want to tell you why you should care about this.
  我先告诉大家为什么要关注它
• 
  
  So without getting too religious,
  我不想说得太宗教化
• 
  
  I want to tell you why I think this is an exciting result.
  我觉得这是个很令人兴奋的结果呀
• 
  
  Why am I dragging you through more algebra than usual?
  为什么这回要用到这么多的代数知识