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2. The turnover rate is as high as 300%, and the customer turnover rate is as high as 90%. Fashion, freshness and delicious experience are integrated, and the customer conversion rate is extremely high.先各自归房，卸去礼服冠带等，换上家常衣裳，再聚集到正院上房。The fundamental reason for using design patterns is to adapt to changes, improve code reuse rate, and make software more maintainable and scalable. In addition, the following principles should be followed when designing: single responsibility principle, open and closed principle, Richter substitution principle, dependency inversion principle, interface isolation principle, composite reuse principle and Dimit principle. Each design principle is described below.孝顺父母是一辈子的事，不必刻意在母亲节、父亲节做些什么，但是在母亲节、父亲节都不做些什么，更何谈平常的孝顺？ show_style();。广东卫视《国乐大典第2季》2019年7月5日期每周五晚播出。节目内容围绕中国民乐主题展开，几乎囊括了中国各民族的传统器乐品种，打破常规器乐节目之中只有乐器演奏的传统，将经典的国乐作品重新配器编曲，糅合戏曲、舞蹈、吟唱、吟诵、话剧、诗赋等多种文化元素进行全新改编，融合传统与现代的表达，用唯美和流行兼备的演绎，展示了民族优秀传统文化的经典力量,竞演乐团融合创新民乐演奏手法与多元艺术形式，带来意想不到的新颖演奏版本，重释国乐经典曲目。The specific UML structure diagram is as follows: