stratumn.地层;阶层
stratum textures地学纹理
stratum transect层样条
stratum analysis地层分析
stratum pressure储层压力
stratum spinosum棘层
stratum fragment地层断片
stratum sampling分层抽样
stratum radiatum辐射层
stratum sinereum灰质层, 灰色被盖
stratum nucleare核层