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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.小葱和秦淼还没笑完，就见云影从正屋里走出来，对少年嗔怪道：看来，你盼着这病好久了，是不是？真是的。聚焦蝙蝠侠的管家阿尔弗雷德的DC剧集《潘尼沃斯》宣布续订第2季，仍旧有10集，明年1月开拍，计划明年内开播。该剧第一季从7月底开始在Epix播出，讲述1960年代伦敦，阿福与蝙蝠侠父亲、年轻的大富翁托马斯·韦恩合作。当季获得了Epix原创剧集最好的首播收看成绩。这部小说和独孤求败有关，整部小说的故事围绕着独孤求败的那柄玄铁重剑展开。3. Vision: Both eyes have not undergone any surgery, and the naked vision of any eye (according to the C-character visual acuity chart) is not less than 0.3. There is no color blindness, color weakness, strabismus, and no severe trachoma or trichiasis.Understand the benefits of using proxies to implement a single-column pattern其实也不必管那么多，杨长帆身上的刀子是挨倭寇砍的，这样的人错不了就是。