many grassland animals follow a nomadic way of life. 草原动物大多随水草迁徙
But they have no way of flushing their prey out of the grass. 但它们无法将猎物赶出草丛
Harvest mice seldom go all the way down to the ground. 巢鼠鲜少在地面行动
stretches one third of the way around our planet. 覆盖距离达到地球周长的三分之一
That is the way things are on grasslands across the planet. 地球上的草原都是如此
to make the most of the rare opportunities that come their way. 来充分利用难得的良机
In the Kalahari, brief rains have given way to the dry season. 喀拉哈里沙漠短暂的雨季已被旱季替代
For many animals, the only way to survive the most hostile times 动物们想要在最严苛的环境里活下来