而许多独居哺乳动物的脑——例如猫、鹿以及犀牛——则在同时期内发育较为缓慢。
The brains of more solitary mammals, such as cats, deer and rhino, grew much more slowly during the same period.
有趣的是，我们发现即便是那些已经同人类有过亲密接触的动物，例如猫类，其大脑还是因为其缺乏社会性而比狗类和马要小了很多。
It is interesting to see that even animals that have contact with humans, like cats, have much smaller brains than dogs and horses because of their lack of sociality.
例如，一个对猫过敏的人可能永远不会成为动物医生。
A person, for example, who is allergic to cats would probably never become an animal doctor.
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