calcareous shale是什么意思

用法例句

Mechanism of the structure control over karst hazards in mud limestone terrain,Three Gorges Reservoir region;

三峡库区泥灰质岩石斜坡带构造对岩溶地质灾害的控制机理

The research on the mechanism of the landform control over karstification in mud limestone area was the starting point of clarification of karst process.

研究泥灰质岩石区地貌对岩溶的控制机理是弄清岩溶过程的出发点。