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

而头，虽然还没有融合，但已经足够坚固，可让它们走出巢穴。

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.

它混合了其祖先的一些两栖动特征，如未融合的肩， 与爬行动相关的特征，如强壮的腿和背。