来自《耶鲁大学开放课程：现代社会理论基础 第13集》

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  social stratification or class structure.
  社会阶层 以及阶级结构的人们
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  Of course the answer seems to be obvious probably to most of you.
  对于你们大多数人来说答案是明确的
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  Yeah, in the United States there is one class, the middle class;
  在美国只有一个阶级 中产阶级
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  we are all middle class. Right?
  我们都是中产阶级
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  That's the typical American answer to this.
  这是一个典型的美式答案
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  But for an analyst it's a bit dubious answer;
  但对研究人员来说 这个答案值得怀疑
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  if there are classes, how on earth there is only one?
  如果真有阶级存在 怎么会只有一个呢
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  Anyway, we will talk about this a great deal.
  不管怎样 我们将随后再深入讨论
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  So let's move to the question of theory of exploitation.
  我们先来看剥削理论的问题
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  And I will have to start this with the labor theory of value,
  这要先从劳动价值理论开始讲起
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  and to go back to Adam Smith
  追溯到亚当·斯密
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  and to see how Marx is proceeding.
  看看马克思是如何发展这一理论的