随着更多的水分的流失，会有更多的侵蚀，同时旱情会让啮齿类动物数量上升，这又会毁坏土壤。

As more water runs off, there is more erosion, while the drier conditions allow for a rise in the rodent population, which further decimates the soil.

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畜群同时造成大范围土地退化，其中20%的牧场因过度放牧、土壤板结和侵蚀而退化。

At the same time herds cause wide-scale land degradation, with about 20 percent of pastures considered as degraded through overgrazing, compaction and erosion.

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地质构造作用力向上抬升地壳，侵蚀再将地壳撕得支离破碎，山脉从此形成，同时也产生了分形图案。

Mountains are the result of tectonic forces pushing the crust upward and erosion tearing some of that crust down. The resulting pattern is a fractal.

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