来自《哈佛大学公共课-公正：该如何做是好 第11集》

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  where do our moral obligations arise from anyway.
  我们的道德责任从何而来
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  And I think, basically,
  我认为从根本上
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  there'd be two places from which they could arise.
  道德责任有两个起源
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  One would be kin and the other one would be reciprocity.
  一是亲属关系 二是互惠
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  And isn't the closer you are associated to other people,
  正因为你和他人联系越紧密
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  there's a natural reciprocity there in terms of
  在和这些人交往时
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  having interactions with those people.
  才会自然产生互惠
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  You interact with the neighbors on your street,
  你和街坊邻居来往
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  with the other people in your country through economic arrangements-
  你通过经济安排和本国其他人产生联系
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  But I don't know
  可你我
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  and you don't know those people in Franklin, Texas,
  既不认识德克萨斯州富兰克林的人们
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  any more than you know the people in Franklin, Mexico, do you?
  也不认识墨西哥富兰克林的人 不是吗