来自《耶鲁大学开放课程：心理学导论 第7集》

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  how to get from the numbers to objects and people,
  这些数字是如何转变成客体 人物
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  and to actions and events.
  动作以及事件的
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  And that's the problem.
  这才是问题所在
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  It's made particularly a difficult problem
  这是个特别棘手的难题
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  because the retina is a two-dimensional surface
  是因为视网膜是个二维平面
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  and you have to infer a 3D world
  而你要在这个二维平面的基础上
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  from a two-dimensional surface.
  延展出一个三维的立体世界
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  And this is, from a mathematical point of view, impossible.
  而这在数学上是不可能实现的
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  And what this means is that
  而这就意味着
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  there--For any two-dimensional image
  对于任何二维平面图像
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  there is an indefinite number of
  都存在着不定数额的
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  three-dimensional images that correspond to it.
  与之对应的三维图像