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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.Publisher Cao Dan, Waiting for Bai Piao's Learning EditionApostles: Kahn, Herd, Prey, Casillas, Shilok, Dirigi, Antoine, Rotes, Luke, Bacar《与狼共舞》以东北全境解放，辽沈战役取得圆满胜利为故事开端，以我党潜伏人员陈少杰在完成东北战场的任务后，只身前往西南区，继续自己的潜伏使命为故事脉络，一幕幕险象环生，命悬一线的故事情节接踵而来，扣人心弦。玉米上去祠堂，陈大爷责怪了他几句，说往后不准再下去，容易让人发现，要是被人发现了这洞，那他藏的那些东西可就全都要被搜了去。福士苍汰饰演幼年丧母，之后成为父亲再婚对象的子女“花卷みこと”，他暗恋着住在同一个屋檐下的义姐“花卷沙罗”，却看到她1年后将要死亡的的命运。讲述了能看到人死亡命运的急救救生员与余命一年的义姐之间禁断的爱情故事。