地理漫步·世界地理英语30篇（5）
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Canyons Cut Deep by Rivers Over Time
峡谷由河流经年深切而成
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Canyons form when rivers cut downward through rock layers.峡谷由河流向下切割岩层形成。
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Hard rock resists erosion and shapes steep canyon walls.坚硬岩石抗侵蚀，塑造出陡峭的峡谷崖壁。
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Softer layers wear away faster, creating varied cliff profiles.较软岩层更快风化，形成多变的悬崖轮廓。
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Water flow, rock type, and uplift all shape canyon depth.水流、岩性和地壳抬升共同决定峡谷深度。
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Grand Canyon shows millions of years of river work clearly.大峡谷清晰展现了河流数百万年的塑造作用。
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Flash floods widen canyons quickly during heavy rain events.暴雨期间的山洪会迅速拓宽峡谷。
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Canyons channel wind and create microclimates on their rims.峡谷引导气流，在边缘形成微气候。
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They reveal Earth’s geologic story in visible, colorful strata.它们以可见且色彩斑斓的地层揭示地球地质历史。