短語詞組短語parent t material 母質parent soil material 土壤母質parent skeleton material 水泥瀝青混郃料parent material horizon [土壤]母質層parent material erosion 母質侵蝕parent material orchard 母本園loess parent material 黃土母質sedimentary parent material 沉積母質purple parent material 紫色母質 返回 parent material