For the most part, they were small, keeping to the trees... 在大部分情况下 它们都很小 在树上栖息
and one of the most streamlined bodies of any animal, 以及动物中最流线型的身体
Like most reptiles, they must bask in the sun to warm up. 与多数爬行动物一样 它们必须晒太阳以保暖
now some of the most incredible gatherings of life on Earth. 其中有一些如今成为 地球上最不可思议的生命聚集
...it has inherited the most aggressive traits from its ancient bloodline. 继承了 来自古老血脉的最具侵略性的特征
...it's no wonder that the most famous predator in the history of life on our planet 难怪地球史上最著名的捕食者
Most early mammals didn't have armor or size to protect them... 多数早期哺乳动物 没有护甲来保护它们
were also making the most of the new abundance. 也在充分利用新的丰富资源
But his most eye-catching adaptation is his feathers. 但它最引人注目的适应性是它的羽毛