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Vast open plains. Immense spaces. Eerie silence.
遼闊的草原。廣袤無垠。萬籟俱寂。
But any feeling of emptiness is an illusion.
然而，你若以為這里死氣沉沉，就大錯特錯了。
The plains of our planet support the greatest gatherings of wildlife on Earth.
草原維系了我們行星最豐富多彩的生命群落。
At the heart of all that happens here is a single living thing. Grass.
這一切最終都依賴于一種生命體的存在。草。
This miraculous plant covers a quarter of all the lands of the Earth.
這種神奇的植物覆蓋了地球上四分之一的土地。
Grasslands exist wherever there is a little rain, but not enough to sustain a forest.
草地無所不在，一點雨水雖然不足以維系一片森林，卻可使一片草地存活下來。
Some are huge. The Central Asian Steppe alone extends one third of the way around our planet.
有些草原非常遼闊。僅中亞的疏樹大草原，便橫跨了地球的三分之一。
It's summer, and eagles effortlessly cruise the thermals, scanning the ground beneath for signs of prey.
在夏天，雄鷹可以毫不費力的在熱氣流上盤旋，搜尋地上獵物的蹤跡。
In the distant reaches of outer Mongolia, one of the planet's great migrations is underway.
在遙遠的外蒙古大草原，地球上規模最大的遷徙大軍正浩浩蕩蕩地行進著。
Few people ever see this extraordinary annual event.
這一蔚為壯觀的場面一年一次，但卻很少有人親眼目睹。
