In the system, the client often needs to interact with multiple subsystems, which causes the client to change with the change of subsystems. At this time, the appearance mode can be used to decouple the client from each subsystem. Appearance mode refers to providing a consistent facade for a group of interfaces in the subsystem. It provides a high-level interface that makes the subsystem easier to use. For example, the customer specialist of Telecom can let the customer specialist complete the services such as charging telephone charges and modifying packages without interacting with various subsystems by himself. The specific class structure diagram is as follows:
PS: Many forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated. Maybe Microsoft will launch a new SOA implementation scheme at that time. Wouldn't it be a waste of time to learn in depth, so they feel that there is no need to learn in depth and just know how to use them. I had the same feeling about this problem before, but now I think that although WCF technology may be replaced, the key to understanding a technology in depth is not to know some more advanced API calls, but to understand its implementation mechanism and way of thinking. Even if the latter technology is replaced, the mechanism behind it is definitely similar. Therefore, if you have a thorough understanding of a technology, you will feel familiar with the new technology and relaxed about it. In addition, after you have a thorough understanding of a technology, you dare to say that you have mastered the technology well during the interview, instead of saying that you use it a lot at ordinary times. Once you ask deeply, you do not know the implementation principle behind it. This is also why I want to write WCF series. I hope this opinion is helpful to some beginners.
心里这么想着，也这么写了出来，末尾还加一句我娘就是这样的脾气。
Reference: Baidu Encyclopedia-Application Double Opening
英王厉声喝道：白凡，敢如此对皇上说话。
项羽和项庄兄弟俩都担心不已，食难下咽。
在这座联邦女子监狱内，帕波遇到形形色色的女囚，第一次领略到“监狱文化”，她将要处理各种各样的问题。尽管认识了一群性格坦率的女囚犯，但她的牢狱生活绝不会一帆风顺……
否则的话就要绕道而行，行走更多的路程，花费更多的时间，该如何决断呢？请大王示下。
慧儿听姑娘吹牛，忍笑转脸。
Cultural Value: Inherit and carry forward one's surname culture and leave valuable books for later generations; Reputation Value: The central bank's credibility is guaranteed and trustworthy. The surname card can be made according to the needs of different surname origins and cultures. The seal-shaped solid wood with exquisite cover can be customized according to different surname requirements.
A4.1 Routine Inspection Items
新年之际，日本屈指可数的著名XX公司的会长与兵卫不幸死于非命。为了维护整个家族的名誉，因新年而聚集在一起的与兵卫家族成员商定攻守同盟，伪造现场报案。中里警部在调查此案时不断发现破绽．并终于将杀人凶手——与兵卫的外甥孙女摩子逮捕归案。但是他感到那些破案线索得来的过于容易，似乎有人在故意引导警方破案。便对结案的真实性产生怀疑……那么，真正的凶手到底是谁呢？而杀人动机又是什么？《W的悲剧》系向埃勒里‧奎因《X的悲剧》《Y的悲剧》《Z的悲剧》致敬的作品，挑战的是经典暴风雪山庄密室杀人模式，谜团构思精巧、极具创意，对人物内心的描摹精准细腻、令人叫绝。奎因盛赞其为"新派推理小说的代表作"，并亲自撰文为小说做解读。堪称夏树静子最负盛名的经典之作，也是中国读者最为熟知的日本推理佳作之一，《W的悲剧》与《砂器》、《火车》同时入选《卫报》"亚洲十大推理小说"。
我们家，可是才爬起来，凡事都不能太张扬。
怪物是独特、可爱而又善良的。有一天，他遇见了一位年轻女性，这让怪物很苦恼。他不想面对人类，因为他知道自己这副模样绝不可能被接纳。但是，他又想面对人类，跟人类说话，一起欢笑。接着，怪物对人类产生了爱慕。然而这是一份无法实现的感情。因为怪物的体内隐藏着秘密，他不能接触人类。可悲的怪物无法抑制地思慕着人类，毫无保留地爱着人类。而人们也因此受到命运的捉弄，内心动摇却坚强生活着。
该剧根据英国同名剧集改编，原版剧集的创作人Cris Cole将执笔创作亚马逊版剧本并与著名制片人Shawn Ryan共同担任该剧的执行制片人。
1. Enter the system settings interface and click "Auxiliary Functions" in the options.
某年，年轻的靖海候施不全浪荡成性，被皇上撤去封位，派做江都县令。初入仕途的施不全连判错案，招致绿林好汉的不满。施不全遂将错案重审，冤情大白。施不全名声大振。升任扬州知府。当朝国舅及其子私设税局，横征暴敛，私刻玉玺，图谋不轨。施不全奉旨乔装查案，身陷圄囹，正值绝望时刻，借机斩了国舅。皇上将施不全调回京……
The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu
