For this is a world with almost no water. 因为这是一个水资源极度缺乏的世界

2. A hostile, seemingly empty world.
   一片不毛之地
3. There is life here.
   却孕育着生命
4. But it exists at the very limits of survival.
   这里的生命时时刻刻处于危机之中
5. For this is a world with almost no water.
   因为这是一个水资源极度缺乏的世界
6. Lands like these cover over a third of our planet.
   像这样的土地覆盖了地球上超过三分之一的面积
7. Here, life is forced to do things differently.
   在这里 生命被迫另辟蹊径
8. This is the most ancient desert of all.
   这里是最古老的沙漠

来自《行星地球 第三季 第三集 Planet Earth S03E03 沙漠与草原》第 5 行