We'd had 10,000 years of extremely knowledgeable pastoralists bunching and moving their animals, but they had created the great manmade deserts of the world.
牧民们已经积累了一万年丰富的畜牧经验， 知道如何群养和迁徙他们的动物， 但是，他们创造了世界上最大的人造沙漠。