1.Alluvial plain
2.the delta plain
3.Alluvial plain
4.Lake plot, alluvial plain
5.Alluvial, alluvial plain
6 flood prone slope
7.Dune-covered plains
8.erosion of the plains
9.Lava platform
10.Dry the erosion of high plains
11.The eroded loess hills
12.Other rocky hills eroded
13.dry erosion hills
14.Erosion low mountain
15.Karst low mountains
16.Dry erosion of low mountains
17.Lava low mountain
18.erosion of Zhongshan
19.Dry erosion of Zhongshan
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