来自《耶鲁大学开放课程：金融理论 第2集 第2集》

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  so Jevons, Menger, and Walras
  杰文斯 门格尔 瓦尔拉斯
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  in 1871 all came up with the idea at the same time of diminishing margin utility,
  在1871年同时提出降低的边际效用
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  and they said if you have people who consume multiple amounts of every commodity
  他们说如果人们每种商品都可消费多个
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  but they have diminishing marginal utility
  但是他们的边际效用降低
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  they're going to behave very much the same way as this little example.
  他们会表现的和这个例子几乎一样
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  So this little example, in fact, is going to be extremely instructive.
  事实上这个小例子是特别有启发意义的
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  In fact it contains all the kernels of truth of a more general model
  事实上它包括了一个人们消费大量日用品
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  where people consume huge amounts of every good.
  的更加通用的例子的所有核心内容
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  Just that they have diminishing marginal utility.
  就因为他们边际效用不断降低
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  So I'm going to now describe a slightly more complicated
  我要讲一个有一点复杂的
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  So I'm going to describe this more complicated model.
  我要讲一个更加复杂的模型
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  So what's the way of building a much more general,
  怎么建立一个能够概括我们讲过例子的