来自《耶鲁大学开放课程：资本主义：成功、危机与改革 第2集 第2集》

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  everybody has the same income
  每个人收入都一样
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  and probably works for Wipro in Bangalore.
  而且可能都在班加罗尔为威普罗公司打工
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  In actual fact--
  而实际上
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  I don't know do you know anything about India?
  有人了解印度吗
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  Okay, good.
  好 很好
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  Now we could infer from that that the vertical side,
  现在我们可以从纵向坐标进行推断
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  the vertical dimension of the world economy
  世界经济的纵向维度
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  can be thought of in two phases.
  可以分两层次来分析
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  One is the difference between countries
  一层是每个国家的
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  measured here by mean GDP per capita,
  人均国内生产总值差异
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  and the differences within countries,
  另一层用于表示每个国家
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  which would be represented by an income curve
  的收入曲线