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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.我才想让虎子去翰林院找王翰林呢。另一边，住在华丽的王都、被人民爱戴着的歌姬·菲妮丝。她虽然作为某位将要继承王位的王子的王妃候补，却在被重重墙壁包围的深宫中孤独度日。这是一部独特的家庭故事剧，以嘻哈乐（Hip-Hop）世界为背景。主人公Lucious Lyon（Terrence Howard）是一个迷人的、精明能干的乐坛超级明星，正准备带领自己的帝国娱乐公司上市。他从小在街头长大，养成了争强好胜的性格。为了保护自己的音乐帝国，他永远不会放弃任何一场战斗。但是现在和他争夺王位的是他前妻和三个儿子，他不可能再像以前那样不择手段。The coefficient is the percentage we see when we click on an ordinary attack with the mouse.