英语语法分析

Objective: To provide the scientific evidence for the identification of Gymnema Sylvestre (Retz.) Schult.

前言：目的：为匙羹藤的鉴别提供科学依据。

These studies aim to provide the theory base of molecular mechanism for drought resistance breeding in Saccharum arundinaceum Retz.

这些研究为斑茅抗旱的分子机制提供初步的理论基础。

Methods The volatile oil chemical compositions of leaf of Gymnema sylvestre(Retz. )Schult were extracted by water vapor distillation, and then were separated and identified by GC-MS.

方法采用水蒸气蒸馏法提取广西匙羹藤叶挥发油，并用GC-MS法分离分析其成分及相对含量。