These self-contained life-support systems keep everything inside from drying out, and it meant that reptiles and the early ancestors of mammals could travel, see the world, set up shop in every corner of Pangaea.
这些独立的生命支持系统可以防止里面的一切变干,这意味着爬行动物和哺乳动物的早期祖先可以旅行,看世界,在盘古大陆的每个角落开店。