Although most other primates have opposable thumbs, their thumbs are shorter, farther down on the hand, and their fingers are longer and less straight.
英
美
- 大多数灵长类动物的拇指,虽然都可屈过来以指头内侧触及另外四指,却更粗短而近于腕部,其馀的手指也更长更弯。