来自《耶鲁大学开放课程：博弈论 第10集 第10集 第10集》

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  but for most of the game,
  对于大部分时间来说
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  it's very unlikely to end up as a pure-strategy equilibrium.
  几乎不会出现纯策略均衡的情况
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  Much more likely that the offense is mixing between passing and running,
  通常进攻时会混合传球和跑阵
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  and for that matter between going to the left,
  而同时又涉及到了
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  going to the right and going to the center,
  左中右这三个不同的方向
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  and the defense is also mixing between..., over its types of defense.
  防守时也是要混合不同的防守方式的
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  So we see that, for those people who were watching yesterday,
  不知道你们昨天有没有看比赛
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  we see that in football games.
  在橄榄球比赛中这很常见的
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  Where do we see it else in sport, some other sports?
  还有别的体育赛事的案例吗
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  I can't have a room full of non-sports fans.
  别告诉我各位都不喜欢看比赛
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  How many of you ever watch any sports?
  有多少人看过比赛啊
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  Let's raise some hands here, some of you do.
  这有一些人举手了 有人看过是吧