Shale is smooth soft rock that breaks easily into thin layers.
英汉词典释义
n.
页岩
We can extract oil from shale.我们可以从页岩中提取石油。More ammonium sulphate solution is being recovered in the process of distilling oil shale.在提炼油页岩的过程中回收的硫酸铵液比过去多了。
英英词典释义
Noun
1. a sedimentary rock formed by the deposition of successive layers of clay