Now, a lot of people cut down a tree in the forest, the trees to make chopsticks, chairs, tables, etc. , can cause soil erosion, flood will often and bring us unfortunately.
现在，很多人在森林里砍树，把树木做成筷子、椅子、桌子等等，就会造成水土流失，洪水也会经常冲来，带给我们不幸的危险。
Soil erosion is the main cause of the degradation of local environment and backwardness in agricultural production.
水土流失是当地生态环境恶化，农业生产落后的主要原因。
Erosivity of rainfall (r) is the potential ability which cause soil erosion and is the function of the physics characteristic of rainfall.
降雨侵蚀力(R)是引起土壤侵蚀的潜在能力，是降雨物理特征的函数。
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