英语语法分析

Without evolution, how do you explain opposable thumbs?

没有进化论，你怎么解释可相对的大拇指？

But unlike man, the ape has opposable thumbs on its feet as well as on its hands.

但是，与人类不同，无尾猿的脚以及手，都有可以与其他手指相对的大拇指。

Opposable thumbs are essential because they give people the ability to grasp objects.

对生拇指非常重要，因为人们需要依靠拇指来抓取物体。