短语词组短語soil micro -erosion 微觀土壤侵蝕學soil anti -erosion ability 土壤抗侵蝕能力soil macro -erosion 宏觀土壤侵蝕soil hydra -erosion 土壤水力侵蝕soil wind -erosion mechanism 土壤風蝕機理Annual soil wind -erosion amount 土壤年風蝕量 返回 soil erosion