来自《耶鲁大学开放课程：博弈论 第19集 第19集》

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  We talked about information sets,
  我们讲了信息集这个概念
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  and these were ways to allow us to model imperfect information.
  它是用来帮助我们给不完善信息建模的
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  So what's imperfect information?
  那不完善信息又是什么意思呢
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  It's a way of being able to capture
  它是一种让我们在一个博弈中同时获知
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  both simultaneity in moves and sequential moves in the same game.
  瞬时行为与贯续行为的方法
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  So it's a way that's going to allow us to meld the lessons
  它把我们在期中考试前所学的内容
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  from before the mid-term and after the mid-term.
  与期中考试后学的内容联系在一起
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  Then we talked about what strategies meant in this context,
  接下来我们探讨了博弈中策略的含义
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  and the basic idea is strategies are instructions,
  一般来说 策略是一种指示
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  strategies for each player, give them an instruction
  对于每个参与人来说 策略在他们各自的
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  at each of their information sets.
  每一个信息集中为他们提供指示
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  Then we talked about what sub-games were,
  我们还讲到了子博弈