英语语法分析

Galerucella grisescens is an important natural enemy which could significantly control Polygonaceae weeds in tobacco fields.

褐背小萤叶甲是烟田蓼科杂草的重要天敌，对蓼科杂草具有良好的自然控制作用。

Many plant species with antimicrobial activities are mainly among the families Compositae, Labiatae, Leguminosae, Liliaceae, Polygonaceae and Umbelliferae.

这些抗菌植物主要分布在菊科、唇形科、豆科、百合科、蓼科和伞形科。

Object To establish a new method for the identification of Yangti (Chinese herb from Rumex L., Polygonaceae) by near infrared diffuse reflectance spectrometry.

目的用近红外漫反射光谱法对部分羊蹄类生药进行鉴别，为生药鉴定提供一种新的方法和手段。