Snakes evolved around the same time as the first true mammals. 蛇的进化时间 与第一批真正的哺乳动物大致相同

256. danger was never far away.
     危险永远不会离得太远
257. The discarded skin of their ancient adversary.
     它们古老对手的蜕皮
258. The snake.
     蛇
259. Snakes evolved around the same time as the first true mammals.
     蛇的进化时间 与第一批真正的哺乳动物大致相同
260. They lost the arms and legs of their reptilian ancestors
     它们失去了爬行动物祖先的四肢
261. and developed a streamlined body...
     并发展出流线型身体
262. making them perfectly adapted to hunting in burrows
     使它们完全适应了在洞穴中捕猎

来自《我们星球上的生命 第一季 第五集 Life on Our Planet S01E05 巨兽阴影下》第 259 行