As the soil is shed, it drops down and forms a little hill of dirt, a mound.
随着土壤的流失，它会下降，形成一个尘土山，一个土丘。
2
The central Kunming Lake covering 2.2 square kilometers was entirely man made and the excavated soil was used to build Longevity Hill.
昆明湖占地220公顷，多为人工湖，其挖掘出的土壤用于建造万寿山。
3
When fires destroy all the vegetation on a hill or mountain, it can also weaken the organic material in the soil and prevent water from penetrating the soil.