方法：野外采集，市场调查，结合文献查阅，形态和组织学比较研究。
Method: Pharmacognostic studies were made through field collection, market investigation, document utilization, comparative morphology and histology.
现在已被广泛应用到军事、工业、农业、犯罪统计学、市场调查、人口统计和医学研究等领域。
Now it has been widely used in military, industrial, agriculture, criminology, market investigation, census, medical research, and so on.
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