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For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.State mode and policy mode are like twins. They both encapsulate a series of algorithms or behaviors. Their class diagrams look almost identical, but their intentions are very different, so they are two very different modes. The policy pattern and the state pattern have in common that they both have a context, policies or state classes to which the context delegates the request to execute剧中故事发生在乾隆初年，我国西疆维部伊斯兰圣裔阿里和卓家生下一位满身溢香的奇女，取名伊帕尔，这女孩被维部誉为“真主的使者”，她就是后来的“香妃”。为了民族的团结伊帕尔被送入宫，她的受宠，遭到了皇后和嫔妃们的妒忌，在后宫展开了一场没有硝烟的斗争。面对两股势力的明枪暗箭，伊帕尔心怀坦荡，以大智大勇，从容应对，粉碎了两股势力一次又一次的阴谋诡计，转危为安，在每场争斗中，伊帕尔都绽放出她的传奇色彩。续作仍由中江功(《冰上恋人》)执导、君塚良一(《跳跃大搜查线》)编剧，共演阵容尚未公布，预计今年9月开拍。《红星照耀中国》电影剧组创作灵感及素材就取自同名报告文学——美国记者斯诺根据自身经历创作的《红星照耀中国》一书。影片主要讲述的是1936年美国青年埃德加·斯诺冒险来到中国红色革命区域的的亲历见闻，在采访和见证了毛泽东、周恩来等共产党领导人，以及红军战士和苏区百姓的风采之后，斯诺以饱含激情的生动文笔写成了《红星照耀中国》一书，该书出版后轰动世界，使全球第一次了解到了彼时艰苦抗战背景下中国共产党的真实情况。大苞谷也不和他们争论，当下竹筒倒豆子，将当时的情形说了一遍。Stephen: English Christian name + Greek derived from the Middle Ages, meaning "crown", English surname, male first name, nicknames Steenie, Steve, Stevie.