来自《耶鲁大学开放课程：博弈论 第6集 第6集》

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  then the goods themselves are substitutes.
  那么它们的产品是可以互相替代的
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  That's not the point I'm making here.
  但重点不在这里
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  Strategic substitutes is a strategy,
  策略替代是一种策略
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  is a statement about the nature of the game.
  这是对于博弈性质的一种描述
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  So strategic substitutes is telling me
  策略替代就是说
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  that my strategy is a strategic substitute of your strategy
  我的策略是你的策略的一种替代策略
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  if the more I do at my strategy,
  我的策略实施越多
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  the less you want to do of yours and conversely,
  你的策略就会实施越少 反之
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  the more you want to do of your strategy, the less I want to do of mine.
  你的策略实施越多我的策略就越少
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  Now, let's come back to the question we started with,
  现在我们来回答刚讲课时提到的问题
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  which has to do with profits and so on in society.
  是与社会现实中的利润有关的问题
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  We know that if these players play these games,
  我们知道如果这些参与人进行博弈