All the inhabitants of the Great Plains are exposed to the elements. 所有生活在草原上的动物 都必须面对大自然残酷的一面
With so many pairs of eyes keeping watch, 有了这么多双警惕的眼睛
For much of the time, they're scattered through this vast landscape, 瞪羚在大部分时间里 都各自流浪在这片广袤的大地上
In the distant reaches of outer Mongolia, 在遥远的外蒙古大草原
one of the planet's great migrations is underway. 地球上规模最大的迁徙大军正浩浩荡荡地行进着
extends one third of the way around our planet. 便横跨了地球的三分之一
scanning the ground beneath for signs of prey. 搜寻地上猎物的踪迹
The plains of our planet support the greatest gatherings of wildlife on Earth. 草原维系了我们行星最丰富多彩的生命群落
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
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