英语语法分析

Extracting lithium from lepidolite was studied.

研究了从锂云母中提取锂的方法。

Firstly, the method of extracting lithium from lepidolite has been studied.

首先，研究了从锂云母中提取锂的方法。

A new method is given for separating K, Rb, Cs from mother liquor after extracting lithium from lepidolite.

提出了一种从锂云母提锂母液中分离钾铷铯的新方法，研究了分离的最佳工艺条件。