It carries fine particles of sand, which bombard exposed rock surfaces, thereby wearing them into yet more sand.

它携带着细小的沙粒，这些沙粒会轰击裸露的岩石表面，从而把岩石磨成更多的沙子。

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The tone depends on the type of exposed rock.

色调取决于出露岩石的类型。

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The conspicuous red patches indicate areas of exposed rock.

而那些显眼的红色斑块显示的是岩石外露的地方。

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Above it looms a fresh white scar of newly exposed rock where the mountainside used to be.

VOA: standard.2010.04.02

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