来自《耶鲁大学开放课程：心理学导论 第7集》

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  have a small list of calls to convey different warnings like
  用有限的几种叫声来表达不同的警报
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  "Attack from a snake" or "Attack from a leopard."
  如"有蛇来袭"或"有豹来袭"等
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  There is a continuous analog signal.
  还有一种连续的模拟信号
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  So, bee dance, for instance, works on this way.
  比如蜜蜂的舞蹈就使用了这种方式
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  Bee dance communicates the location of food sources
  蜜蜂的舞蹈传达了蜜源的地点
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  but doesn't do it in any syntactically structured way.
  但却并未使用任何语法结构的方式
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  Rather, the intensity of the dance
  相反 舞蹈强度
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  corresponds to the richness of the food source.
  和蜜源中蜂蜜的多少有关
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  And then, you get things like random variation
  最后一种是对某一主题的随机变化表述
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  on a theme such as birdsong.
  比如鸟鸣
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  But what you don't find in any real sense
  但无论从什么方面 你都根本无法找到
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  is phonology, morphology, syntax,
  语音 语态 语法