1. An Arctic mound or conical hill, consisting of an outer layer of soil covering a core of solid ice. 
   冰举丘北冰洋土丘或丘状小山，由土壤外层履以固体冰丘组成
2. soil and soil mass 
   土和土体
3. Run down a hill 
   跑下山
4. Article 22 In a water-eroded region, by taking a small river basin comprising the natural ravines and flanking hill slopes as a unit, a comprehensive system for the prevention and control of soil erosion shall be set up on the basis of overall planning and comprehensive rehabilitation. 
   第二十二条　在水力侵蚀地区，应当以天然沟壑及其两侧山坡地形成的小流域为单元，实行全面规划，综合治理，建立水土流失综合防治体系。
5. charge property of soil 
   土壤电荷性质

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