shale

名词 shale:

1. a sedimentary rock formed by the deposition of successive layers of clay

1. Shale underlies coal.
   页岩层在煤层之下。
2. The new process extracts oil from shale.
   这一新方法用于从页岩油里提炼出石油。
3. Most of the rock in this mountain is shale.
   这座山上大部分的岩石都是页岩。