was shaping a smaller breed of creature. 正在形成一种较小的生物
But this lost world of vertical cliffs 但这个由陡峭悬崖组成的失落世界
birds had become the last remaining branch of the dinosaur family tree. 鸟类成为恐龙族谱中仅存的一支
and capable of walking within hours. 而且出生之后几小时就能行走
But a handful of ground-dwelling birds did make it through. 但少数栖息在地面上的鸟类 幸存了下来
there had been hundreds of ancient species living in the trees, 树上居住着数百种古老的物种
another group of animals had also clung on... 但另一群动物也坚持了下来
They'd inherited a planet free of dinosaurs. 它们继承了一个没有恐龙的地球