It's not so risky to put your head down 它们可以毫无顾虑地埋头吃草
Nowhere on our planet is the life giving power of water so clearly demonstrated. 地球上没有其它地方能比这里 更能清楚地证明水对生命的意义
but not all the elephants have been so lucky. 但是 并非所有的象都是那么幸运
Nowhere else on Earth are so many animals on the move with the same urgent purpose. 如此多的动物出于同一个紧急目的 而进行大规模迁徙 这在地球上其它地方可看不到
So air currents powered by the sun 至此 由太阳驱动的大气环流
That is why the jungle grows so vigourously 因此 这里的丛林茂密葱郁
so the deciduous forests of America begin to shut down 美洲落叶林开始放慢生命的脚步