stratumn.地层;阶层
stratum stability岩层稳定性
stratum structure阶层结构
stratum Malpighii马耳皮基(氏)层, 表皮生发层
stratum gastricum胃层
stratum vasculare血管层
stratum corticale皮层, 外皮
Stratum papillare乳头状层
stratum profundum深层
stratum compactum致密层
stratum granulosum粒层,颗粒层