来自《耶鲁大学开放课程：金融理论 第4集 第4集》

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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
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  So that was a shock to economists.
  这对经济学家来说是一个打击
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  It meant that the argument they'd relied on,
  因为它意味着他们曾经所以来的理论
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  the thing which they were using to persuade policy people that
  他们曾用来说服政客的理论
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  the free markets were a good thing, is a false argument.
  自由市场是好的 是错误的
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  It rests on a premise that's indefensible,
  它依赖于一个无可辩驳的前提