来自《耶鲁大学开放课程：博弈论 第21集 第21集》

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  that repeated interaction will get us
  如果进行重复的互动
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  as it were, out of the Prisoner's Dilemma.
  可以使我们走出囚徒困境
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  So why don't we start with the Prisoner's Dilemma.
  所以我们最好从囚徒困境开始讲
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  I'll put this up out of the way and we'll come back to it.
  我先把这块黑板放上去 待会回头再讲
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  Let's just remind ourselves what the Prisoner's Dilemma is
  我再提醒你们一下什么是囚徒困境
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  because you guys are all full of turkey and cranberry sauce
  估计你们脑子里装的全是火鸡和酸果曼沙司
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  and you've probably forgotten what Game Theory is entirely.
  早就把什么是博弈论忘得一干二净了
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  Let's name these strategies, rather than alpha and beta,
  我们先给这些策略起名字 不再叫α和β
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  let's call them cooperation and defect.
  把它们叫合作与背叛
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  And that will be our convention this week.
  这个星期我们就都这么叫
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  We'll call them cooperation and defect.
  我们把它们分别叫合作与背叛
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  This is Player A and this is Player B,
  这是参与人A 这是参与人B