方法选同一品种怀山药在不同地区同期种植，分析其药材的主要化学成分。
Method the same varieties of Rhizome Dioscorea were cultivated in different areas at the same time and then the main chemical compositions were analyzed.
方法选同一品种怀山药在不同地区同期种植，分析其药材的主要化学成分。
Method the same varieties of Rhizome Dioscorea were cultivated in different areas at the same time and then the main chemical compositions were analyzed.
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