短語詞組短語concretionary materials 固結材料concretionary horizon 結核層concretionary con 結核concretionary layer 結核層concretionary structure 結核狀構造concretionary sand 結核狀砂concretionary structures 結核構造concretionary nitrogen 凝固氮concretionary laterite 結核磚紅壤 返回 concretionary