What we call the evolutionary hypothesis is an explanation of a host of biological and paleontological observations.

我们所说的进化假说是关于生物学和古生物学的大量观察的解释。

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The basis of this hypothesis is evolutionary biology.

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Textbooks in evolutionary psychology have proposed the hypothesis that the fear of spiders is an adaptation shaped by the mortal threat posed by their bites.

NEWYORKER: It Ain��t Necessarily So