短語(yǔ)詞組短語(yǔ)illuvial l horizon 聚積層manganese spot illuvial horizon 錳斑淀積層iron spot illuvial horizon 鐵斑淀積層gypsum illuvial horizon 石膏淀積層organo illuvial horizon 有機(jī)質(zhì)淀積層 返回 illuvial horizon