And the bones, while still unfused, were sturdy enough to have allowed them to go outside the nest.

而骨头，虽然还没有融，但已经足够坚，让它们走出巢穴。

And it mixed some of the amphibian features of its ancestors, like unfused shoulder bones, with features associated with reptiles, like strong leg and back bones.

它混祖先的一些两栖动物特征，如未融的肩骨， 及与爬行动物相关的特征，如强壮的腿骨和背骨。