来自《耶鲁大学开放课程：心理学导论 第14集》

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  "What about humans?" What about us?
  那人类呢 我们是怎样的
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  What do we know about
  有关男女差异
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  the differences between males and females?
  我们知道什么
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  Well, humans are a relatively polygamous species.
  人类是一个相对一夫一妻制的物种
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  Most cultures--most human cultures are polygamous.
  大多数人类文化都是一夫一妻制
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  American culture is what they call "Serial monogamy."
  美国文化被称作是系列婚姻
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  So, we're not like some species of birds.
  所以我们不像一些鸟类
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  We don't mate for life.
  我们不是为了生活而交配
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  We do a series of peer-bondings for some period of time.
  我们花时间建立一系列伴侣关系
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  It could be for life,
  可能是为了生活
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  but indeed may not be and usually isn't.
  但事实上也许不是 通常不是
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  Males are bigger than females.
  男性比女性体型大