来自《耶鲁大学开放课程：博弈论 第2集 第2集》

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  let's just write it down why don't we.
  让我们把它写在这吧
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  The players here in this game are Player I and Player II.
  这次博弈中有两个参与人 I和II
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  What about the strategy sets or the strategy alternatives?
  那么策略集合是怎样的呢
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  So here Player I's strategy set,
  这是参与人I的策略集合
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  she has two choices top or bottom, represented by the rows,
  她有上下两种选择 用横排来表示
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  which are hopefully the top row and the bottom row.
  即上下两排
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  Player II has three choices,
  参与人II有三种选择
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  this game is not symmetric,
  这个博弈不是对称的
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  so they have different number of choices,
  所以他们可选策略数量不同
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  that's fine.
  这无所谓
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  Player II has three choices left, center, and right,
  参与人II有三种选择 左中右
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  represented by the left, center, and right column in the matrix.
  用矩阵的左中右三列来表示