one of the rarest mammals on the planet. 一种地球上最稀有的哺乳动物
A third of the land on our planet is desert. 我们星球上1/3的陆地是沙漠
Here, live some of the strangest and least-known animals on the planet. 这里住着一些地球上最奇异 和最鲜为人知的动物
their fresh water has brought life and abundance to planet Earth. 淡水为地球带来了无数生机与富饶
and form one of the most productive habitats on the planet. 成为地球上一处 最肥沃的野生动物栖息地
Driven by gravity, they're the most erosive forces on the planet. 它们借助地心引力 成为地球上最大的侵蚀力量
Only 3 percent of the water on our planet is fresh. 地球上只有3%的水是淡水
On the highest summits of our planet 在地球上最高的地方
that stretches across a tenth of our planet - 这座山脉绵延长达地球圆周的1/10
They're the most powerful erosive force on our planet. 它是地球上最大的侵蚀作用