来自《耶鲁大学开放课程：心理学导论 第11集》

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  in evolutionary biology over the last half century.
  进化生物学最大的改革
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  Forget about the animal a bit and take another perspective.
  暂时忘记动物 从另一个角度看问题
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  Take a perspective of the cold virus.
  从感冒病毒的角度来看这个问题
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  People have been sneezing in the front row.
  坐前排的同学一直在打喷嚏
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  Now, you're coughing. Thank you.
  现在你咳嗽了 谢谢
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  Why do you sneeze when you get a cold?
  你为什么在感冒的时候打喷嚏呢
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  Here's not a--
  这不是
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  Point made.
  观点被证实
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  Here is--Here's not a bad answer.
  这是 这里有个不坏的答案
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  You sneeze because you've got all these germs inside you
  你打喷嚏是因为你体内有这些病菌
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  and your body wants to get the germs out,
  你的身体希望把这些病菌排出去
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  so you sneeze.
  所以你打喷嚏