英语语法分析

Dracaena people who can resist high purity.

龙血纯度高的人才能抵抗。

At present, it is mainly extracted from Dracaena Draco linn.

目前血竭的生产主要是从龙血树中提炼而成。

Objective:To screen the antitumor extract from Dracaena cambodiana Pierre ex Gagnep.

目的：筛选海南龙血树的抗肿瘤活性部位。