This means topsoil contains few of the ingredients needed for long-term successful farming.
这意味着表层土壤几只含有少量长期成功耕作所必需的成分。
2
Because of this increased concentration, regrowth of plants is minimal, leading to increased erosion, which leads to a decrease in the fertile topsoil, leading to even less regrowth.
由于浓度的增加，植物的再生长很少，导致侵蚀增加，使得肥沃的表层土壤减少，再生长更少。
3
As it crashed down the steep mountainside like a gigantic snowplough, it swept up trees, boulders and tons of topsoil, and completely crushed and destroyed the six villages that lay in its path.