基本解释[地球科学]多边形土壤词组短语短语polygonal fissure soil 多角形裂缝土polygonal soil crack 多角龟裂polygonal -structured soil 多角形结构土polygonal fi ure soil 多角形裂缝土stone polygonal soil structure 砾质多角型构造土专业释义地球科学多边形土壤