shale例句

We must find economical methods for extracting oil from shale.
我们必须找到从页岩中采油的经济方法.

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.

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