来自《耶鲁大学开放课程：博弈论 第10集 第10集 第10集》

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  All right, the running game and the passing game.
  很好 跑阵和传阵
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  So a very simple idea whether to run or whether to pass
  当你持球时是跑阵还是传球
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  when you have the ball
  这点大家很容易想到
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  is likely to end up as a mixed-strategy equilibrium.
  会达成一个混合策略均衡
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  The defense is also randomizing between, for example,
  防守的时候也会涉及到随机化吧
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  rushing the passer or playing a run defense.
  例如说快速传球或者跑位防守
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  Is that right? This is not exactly a game I know a lot about,
  对吧 我对橄榄球不是很了解
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  but I'm hoping I'm getting close enough here.
  但愿我说得还算对吧
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  It couldn't possibly be a pure-strategy equilibrium,
  体育赛事一般不会达成纯策略均衡
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  other than very extreme parts of the game,
  除非在某些特别极端的情况下
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  like at the end of the game perhaps,
  比如说比赛最后白热化的阶段
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  but for most of the game,
  对于大部分时间来说