Grasslands exist wherever there is a little rain, but not enough to sustain a forest. 草地无所不在 一点雨水虽然不足以维系一片森林 却可使一片草地存活下来

6. At the heart of all that happens here is a single living thing.
   这一切最终都依赖于一种生命体的存在
7. Grass.
   草
8. This miraculous plant covers a quarter of all the lands of the Earth.
   这种神奇的植物覆盖了地球上四分之一的土地
9. Grasslands exist wherever there is a little rain, but not enough to sustain a forest.
   草地无所不在 一点雨水虽然不足以维系一片森林 却可使一片草地存活下来
10. Some are huge.
    有些草原非常辽阔
11. The Central Asian Steppe alone
    仅中亚的疏树大草原
12. extends one third of the way around our planet.
    便横跨了地球的三分之一

来自《行星地球 第一季 第七集 Planet Earth S01E07 伟大草原》第 9 行