来自《耶鲁大学开放课程：心理学导论 第12集》

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  If I were to produce 100 children,
  如果我生了一百个孩子
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  I could stand to lose a few,
  那失去几个我也能受得了
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  but if I just produce five in my lifetime or two or one,
  但如果我一辈子就生了五个或两个或一个
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  they become very precious to me.
  对我而言他们就十分珍贵了
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  And so, the story of the evolution of a species like us
  因此 在像人类这样的物种进化过程中
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  involves a long period of dependence and deep, deep bonds
  包含着父母和孩子之间形成的长期依赖和
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  between the parent and the child.
  很深很深的情感纽带
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  And that's part of what I talked about,
  这是我所讲的父母是如何对待孩子的
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  how parents respond to children.
  其中的一部分内容
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  And I want to begin this class by giving an illustration
  我想在这堂课的开头放部有关父母如何
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  from a documentary about parental response to children,
  对待子女的纪录片 并以此为例
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  but I want to give it in a species that's not us.
  但我想用非人类物种