来自《耶鲁大学开放课程：金融理论 第4集 第4集》

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  What's the marginal utility to B of X?
  那关于X B的边际效用是多少呢
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  Well, it equals 2 thirds times 1 over 6 fifths,
  等于2/3乘以1/6
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  which is 5 sixths, which is 10 over 18,
  也就是5/6 即10/18
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  which is 5 over 9.
  也就是5/9
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  So these two numbers are different.
  这两个数字是不同的
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  The marginal utility to B is bigger than the margin
  B的边际效用比X的边际效用大
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  utility--of X--is bigger than the margin utility to A of X.
  即比A关于X的边际效用大
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  So clearly the final equilibrium allocation doesn't
  所以很明显最终的平衡分配
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  maximize the sum of utilities.
  并没有最大化效用的总和
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  By switching some goods from A to B you could make both people
  通过A和B的货物交换 你可以使
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  better off clarification: you could increase the sum of
  更加富裕 即增加双方的效用总和
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  both peoples' utilities, though one person would end up .
  尽管一方会停止交易