1. Chemotaxonomy: Method of biological classification based on similarities in the structure of certain compounds among the organisms being classified.
化学分类学：根据生物体的某些化学物质结构的相似性来进行分类的方法。
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2. Wood extractives exhibit significant effects on wood properties and hence its utilization. They also play an important role on the chemotaxonomy of tree species.
木材浸出物对于木材材性和木材利用都有重要影响，而且在树木化学分类上也有重要意义。
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3. The results in this thesis offer phytochemical proofs to plant chemotaxonomy and provide more chemical evidences for exploiting and utilizing the natural resources.
4. The results of this thesis have important values for chemotaxonomy, developing and utilizing the natural resources and studies on the plant pharmacological activity.
本论文研究结果，对大戟属植物的分类、资源开发利用及该属植物药理活性研究具有重要意义。
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5. The results of this thesis have important values for chemotaxonomy, developing and utilizing the natural resources and studies on the plant pharmacological activity.
