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.

youdao

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.

youdao

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.

youdao