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

而骨头，虽然有融合，但已经足够坚固，可以让它们走出巢穴。

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，如未融合的肩骨， 以及与爬行动相关的，如强壮的腿骨和背骨。