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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.She said frankly that the best part of marriage is that when you want someone to accompany you, he is willing to accompany you.本剧是一个独立的浪漫喜剧，讲述了一段三角恋——其中两人是遭遇了中年性生活危机的一对夫妻。Priscilla Faia饰演Izzy Silva，一个心理学的研究生，浪漫主义者，在室友的怂恿下做起了高级应召女郎。本来应作为婚姻调味剂的Izzy不小心卷入了一场真正的爱情。Subject interface and implementation class:示好？王尚书看着胡敏，唇边溢出一缕讽刺的笑容。1949年10月，新中国刚成立不久，百废待兴，各行各业急需人才建设。为了更好发展国家建设，中国高层特别派出一批专家搭乘专列前往苏联学习。　　本片内容讲述一西藏喇嘛到新加坡访问，却被日本驻新加坡赤军在机场伏击，连带跟喇嘛在同一时日出生的少女罗美薇也重伤垂危，三人被送到医院救治，但由于二人血型特别，根据电脑显示，新加坡亦只有三人有此血型，国际刑警为免