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So many concepts, don't have a headache! Let's look at the relationship between the three methods with pseudo code!香荽点头，含笑看着他。The following procedure is to use the state mode to improve the light. When it comes to encapsulation, the behavior of the encapsulated object is generally preferred over the state of the object. But the opposite is true in state mode, The key to the state mode is to encapsulate each state of the thing into a separate class, and the behaviors related to this state are encapsulated inside this class, so when button is pressed, only the request needs to be delegated to the current state object in the context, and the state object will be responsible for rendering its own behaviors. At the same time, the state switching rules can be distributed in the state classes in advance, thus effectively eliminating a large number of conditional branch statements that originally existed.0-200(1) Air damping type time relay is also called air bag type time relay. It delays according to the resistance generated by air compression. Its structure is simple, its price is low, and its delay range is large (0.4 ~ 180s), but its delay accuracy is low.甲午战争后，围绕远东的权益，日本和俄罗斯的关系恶化。着眼于对俄战争的日本与英国结成同盟。经过驻英国回国的真之就任海军大学教官致力于培养下一代指挥官，另一方面，子规完成了俳句的革新，壮烈的斗争之后去世。日本政府一方面企图通过外交谈判修复对俄关系，另一方面也在稳步进行开战的准备，真之也被联合舰队参谋所补充。于是，日本终于决定与俄罗斯断交，宣战。联合舰队攻击俄罗斯远东舰队的基地·旅顺,不过，连续两次的闭塞作战失败，真之丢失亲友·广濑武夫。大本营将作战转换为陆军的旅顺要塞攻略。于是，日本人知道了近代文明所具有的恐怖。怔了好一会，才把那份答卷抽出来，轻轻搁在一旁，然后继续呆坐。