来自《耶鲁大学开放课程：现代社会理论基础 第7集 第7集》

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  I do not expect the cook to prepare me a good meal
  我并不指望厨师为我做一顿好饭
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  because I need a good meal
  是因为我需要一顿好饭
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  and I expect the cook to like me.
  或者是因为厨师会喜欢我
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  I want him to cook a good meal
  我期望厨师会为我做一顿好饭
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  because then I will give a tip.
  是因为我会给他可观的小费
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  It is in the self-interest of the waiter to
  侍者也是出于私利才会为我服务
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  serve me well and serve me good food.
  帮我端茶递水
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  Otherwise I will not go back again
  因为若非如此 我便再也不会登门
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  and I will not give a tip.
  也不会付任何小费
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  I will punish.
  我会惩罚他们
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  It is appealing to the self-interest of the person for
  我期待某人为我做某事
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  whom I expect something, and not is benevolence.
  是出于私利而非善心