地理漫步·世界地理英语30篇（7）
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Rivers Shape the Land
河流塑造地貌
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Rivers flow from high places to low places.河流从高处流向低处。
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Water cuts through rock and soil slowly.水缓慢地切割岩石和土壤。
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Valleys and canyons form over many years.山谷和峡谷历经多年形成。
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Rivers carry sand and mud downstream.河流将沙子和泥浆带向下游。
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When rivers slow, they drop their load.当河流流速减缓时，便会沉积所携带的物质。
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This builds deltas near the sea.这在近海处形成三角洲。
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The Nile River has a large delta in Egypt.尼罗河在埃及拥有广阔的三角洲。
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Rivers give life to plants and animals.河流为动植物提供生命之源。