来自《耶鲁大学开放课程：古希腊历史简介 第5集 第5集》

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  produces is the more people you have,
  人越多 产出就越大
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  up to a point that's good.
  这在达到临界点之前是好事
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  There are more people who can work
  越来越多的人从事工作
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  to increase the production, but beyond that point
  生产力得以提高 但是一旦突破临界值
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  there are more people to feed than the production can produce,
  花费就要超过所得了
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  and that leads to a desire for expansion of the land available for cultivation.
  它导致了对土地扩张的需求
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  Now, there are a couple of ways that can go;
  对此有几种解决方式
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  one that was certainly important and again it's for
  有一种很重要的
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  something that Hanson emphasizes, is what he calls internal colonization.
  被汉森一再强调为 内部殖民的方式
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  The way these things work,
  这一方式是这样运作的
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  when you are engaged in agriculture,
  当你从事农业
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  it's natural to go first to that soil,
  你自然而然的会首先关注土壤因素