1、
a metamorphic rock, intermediate between shale and slate, that does not possess true slaty cleavage.
厚层泥岩一种变质岩，在页岩与板岩之间，不具备真正的板块解理
互联网摘选
2、
Cleavage and fracture have a strong impact on blasted result for rock mass.
节理裂隙对岩体爆破效果有很大的影响.
网络文摘精选
3、
A metamorphic rock intermediate between shale and slate , that does not possess true slaty cleavage.
一种细颗粒的变质岩,由泥质岩受热形成.
互联网摘选
