Their back paws each have one large clawless opposable digit, which allows them to grasp branches with their feet, freeing their hands to forage.

它们的后脚各有一个大而无爪的可对立的指头，这样就可以用脚抓住树枝，腾出手来觅食。

In fact, there are other animals such as apes that have opposable digits; they have something that is like our opposable thumb.

事实上，还有其他动物， 如猿类，它们的手指相对;他们有一些东西就像我们相对的拇指。