探险家罗伊·查普曼·安德鲁斯当时认为，鲸鱼一定是一种返祖的陆地生物。
Explorer Roy Chapman Andrews argued at the time that the whale must be a throwback to a land-living ancestor.
在某些动物身上好几代之后还有返祖的倾向。
There is a tendency in some animals to throw back for several generations.
返祖必将受到思维能力的阻碍，而复古恰恰是返祖的一种形式。
Atavism must be counteracted by the powers of the mind, and reaction is a form of atavism .
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