来自《哈佛大学公共课-公正：该如何做是好 第11集》

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  or what country we're born into doesn't necessarily mean that
  或我们出生的国家 未必就意味着
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  we won't develop an obligation based on
  我们不会养成基于
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  some type of benefit, I guess, to sort of...
  某种利益基础上的义务 我觉得
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  So your obligation to your aged parent
  所以你对年迈父母的义务
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  that's greater than to aged parents around the world,
  大于你对世上所有年迈父母的义务
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  is only because and insofar as you're repaying a benefit
  只因为你是在报答
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  that your parent gave you when you were growing up?
  你父母对你的养育之恩
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  Yeah, I mean, I would say
  对 我是说
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  that if you look at cases of adoption where,
  如果你看看收养的例子
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  you have a biological parent somewhere else that
  你有亲生父母在世
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  you don't interact with,
  你和他们没有联系
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  and then you have a parent who adopted you,
  然后有父母收养了你