水土流失，其实是一种主要的侵蚀地貌演化过程。
Water and soil loss is an important physiognomy evolution course.
开发建设过程中造成水土流失越来越严重。
Soil erosion is more and more serious in the development and construction processing.
水土流失其实是一种主要的侵蚀地貌演化过程。
Water and soil loss is an important landforms evolution course.
水土流失其实是一种主要的侵蚀地貌演化过程。
Water and soil loss is an important landforms evolution course.
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