来自《耶鲁大学开放课程：博弈论 第9集 第9集》

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  Everyone okay with that idea?
  大家都知道这个结论吧
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  Now this very simple idea is going to have an enormous consequence,
  这个简单的结论要派上大用场的
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  and here's the enormous consequence.
  它的大用场马上就要揭晓了
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  Simple idea, big consequence.
  小结论，大用场
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  So there's going to be a lesson that follows from
  这个简单得再不能简单的结论
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  this incredibly simple idea and this is the lesson.
  引申出了一个重要的内容
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  If a mixed strategy is a best response,
  如果一个混合策略是最佳对策
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  so if a mixed strategy is the best thing you can be doing,
  如果一个混合策略是你的最优选择
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  then each of the pure strategies in the mix,
  那么混合策略中的每个纯策略
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  I'm being a little bit loose here
  我说得不够严谨
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  but I mean assigned positive probability in the mix,
  我的意思是说被赋予正概率的纯策略
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  for those people who are nerdy enough to worry about it,
  这是说给那些吹毛求疵的同学听的