the surface of our planet has undergone a sudden change. 地球的表面发生了突然的变化
for the greatest gatherings of wildlife on planet earth. 最壮观的野生动物群提供了舞台
of these unpredictable but ultimately bountiful lands. 这变化莫测而又极其慷慨的大草原
Grass can survive some of the harshest conditions on earth, 青草可以在地球上最为极端的环境下生长
Forever chasing the seasonal growth of the grass 永远追寻着他们所需要的
They're testing the legs that will carry them thousands of miles, 他们正在测试自己跋山涉水用的四肢
so too do the leaves of the newly sprouting grass. 也正是青草发新芽的时候
depends on the turn of the seasons. 都依赖于季节的更迭