短语词组短语soil micro -erosion 微观土壤侵蚀学soil anti -erosion ability 土壤抗侵蚀能力soil macro -erosion 宏观土壤侵蚀soil hydra -erosion 土壤水力侵蚀soil wind -erosion mechanism 土壤风蚀机理Annual soil wind -erosion amount 土壤年风蚀量 返回 soil erosion