The related principles and laws have been extracted and generalized by musicians one generation after another and eventually they are boiled down to become the core element of harmonic theory.
其运用规则被一代代音乐工作者总结、归纳，最终沉淀为和声理论的核心要素之一。
2
On the basis of a composing method of universal harmonic trapezoid motion laws, nondimensional general curve formulation of driven cam is built.