英语语法分析

Selaginella sinensis is the mainly fern spores.

蕨类孢子以中华卷柏和三缝孢为主。

Object To study the chemical constituents of whole plant of Selaginella stauntoniana Spring.

目的研究旱生卷柏的化学成分。

Another part is about the separating from the Petroleum ether fraction of Selaginella uncinata (Desv. ) Spring.

另一部分是对瑶药翠云草石油醚萃取部位化学成分进行分离。