来自《耶鲁大学开放课程：金融理论 第2集 第2集》

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  I can move along here.
  我能继续往下讲了
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  So I'll keep looking at you as I proceed here.
  我会一边讲一边关注你的掌握情况
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  So don't feel bashful.
  别感觉害羞
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  Speak up if it's not making sense.
  听不懂就说出来
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  So what was the great conceptual advance?
  在概念上巨大的进步是什么
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  It was one conceptual advance was the budget set.
  其中一个是预算集
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  Now, this will turn out to be, in economics
  在经济学上这就是
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  the rest of the 140 of them have all got this down,
  剩下的140个已经都结束了
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  but as soon as we turn it into a financial problem
  如果变成金融问题
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  they're not going to be able to do it again
  就不能再这样做了
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  even though it's going to be the same idea.
  尽管道理还是一样的
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  So this budget set was an extremely clever idea
  预算集是个特别聪明的想法