Fossilized remains of Acanthostega, a primitive fish, reveal that even though the animal had rudimentary limbs, it could not walk on land.
棘螈是一种原始鱼类，它的化石遗迹显示，尽管棘螈有基本的四肢，但它却不能在陆地上行走。
2
He received rudimentary village schooling, but mostly he roamed his uncle's farm collecting the fossils that were so abundant in the rocks of the Cotswold hills.