短语词组短語soil aeration porosity 土壤通氣孔隙度soil aeration rate 土壤通氣率soil aeration and permeability 土壤通透性能soil layer in aeration zone 包氣帶土層Aeration soil 土壤通氧aeration of soil 土壤通氣aeration zone soil 包氣帶土壤 返回 soil aeration