历史发展的规律
The law of historical development
以上为机器翻译结果，长、整句建议使用 人工翻译 。
扬琴流派的演变过程，从单一化向多元化进行，遵循着历史的继承性和发展性、稳定性和变异性的客观规律。
During the evolution of styles, especially the usage from single to pluralism, it followed historical continuity and development, stability and variability, which are objective law.
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