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中文字幕家庭乱伦免费大片8.0

类型:纪录 美国 2020 

主演:未知

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中文字幕家庭乱伦免费大片剧情简介

Dogs have long been dependable companions by our sides. But it wasn’t always that way, and a look at their closest living relative, the wolf, makes it clear why. Research into dog domestication and intelligence offers clues into the human-dog relationship. And analyzing dogs’ brain activity and genes may even help answer whether dogs are in it for the food—or if they really love us.

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