The discovery supports a hypothesis that ancient spiders first evolved to produce silk from their feet before changing to the modern configuration of producing it in their abdomens.
这个发现提供了一个假说，蜘蛛的祖先可能是用脚吐丝，只是到了现代才改为由腹部吐丝的。
The discovery supports a hypothesis that ancient spiders first evolved to produce silk from their feet before changing to the modern configuration of producing it in their abdomens.
这个发现提供了一个假说，蜘蛛的祖先可能是用脚吐丝，只是到了现代才改为由腹部吐丝的。
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