任何事物的本质都是由这两个基本层次构成的统一体，把握这一点对于认识和改造事物具有重要意义。
The essence of everything is a unit constituted by these two basic levels. It is significant to master this point for the comprehension and remaking of things.
配伍是方剂学的核心理论，也是研究方剂的关键问题，探求方剂的配伍规律对于在更高层次上认识方剂的配伍方法、指导临床用药具有十分重要的理论及实际意义。
Compatibility of medicine is the key of prescription. It is important to research the law of compatibility of prescription and to instruct the clinic in theory and practice.
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