But just as life got used to colder, drier conditions, 但就在生命逐渐适应 更寒冷、更干燥的条件时
Amniotic eggs allowed them to flourish in the drier conditions 蛋能使它们在干旱的环境下兴旺发展
these creatures could colonize the drier land 能够以两栖动物无法做到的方式
The world's deserts are growing bigger, hotter and drier, 世界沙漠的面积在扩大 温度更高 更加干燥