合方是在中医辨证论治思想指导下方剂组合应用的方法，是方剂加减变化的一种特殊形式。
Combined prescription is a method to combine several prescriptions guided by the idea of therapy with syndrome differentiation.
结论：方剂中药物加减化裁都可能影响方剂的组成结构及作用，这种改变与方剂中微量元素含量配比的改变密切相关。
Conclusion: the composition and affect are effected by plused or reduced about Chinese medicine in inscription. The effect is closely related to the content of trace element.
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