来自《耶鲁大学开放课程：基础物理 第3集 第3集》

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  "Is this just an accident
  "这种情况纯属偶然
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  or is it part of a big picture?"
  还是这只是物理学大体系的冰山一角"
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  It turns out,
  已经证明的是
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  it's part of a big picture
  这确实只是冰山一角
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  and all of general relativity is
  广义相对论的所有理论
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  based on this one great equivalence of two quantities
  都是建立在这两个质量相等的基础之上
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  which are very different attributes.
  而这两个质量的属性有很大差异
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  Why should the amount by which you're attracted to the Earth
  为什么物体受地球引力的大小
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  be also a measure of how much you hate acceleration?
  恰好能衡量物体加速的难易程度呢
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  Two different features, right?
  这是两个完全不同的概念 对吧
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  But they happen to be the same.
  但它们确实恰好相等
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  Anyway, what physicists do
  总之 物理学家的工作就是