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When the invariant and variable behaviors are mixed together in the subclass implementation of the method, the invariant behaviors will repeat in the subclass. We move these behaviors to a single place through the template method pattern.Let's look at another example of broadcasting. A program has 5 characters. After receiving the broadcasting message, it uses the stamp to draw the shape flower pattern.8.13淞沪抗战中，猛虎团在团长谢云汉的指挥下坚守防线。这时猛虎团接到退守的命令，并抽调三连去执行一项绝密的“桐计划”任务。全团官兵将数倍的日军击退，三吨国有资源黄金得以保护。中共地下党在顾也舟的领导下组织各界爱国人士积极援助这支孤军。日军得知猛虎团与“桐计划”有关，他们是为转移日军注意力争取时间转移作为战略资源的物资，于是日军改变了进攻策略。谢云汉受命带领部队和因故未能转移的三吨黄金撤出阵地，在租界被迫执行军令缴械，并被送至一座军营隔离。从此命运多舛，日军为了打击中国军民的抗战决心，用尽各种手段企图劝降，军统严密监视孤军以防叛变。中共地下党全面开展救援。最终全团顺利越狱。啊，啊。Two implementation classes:BackOnly when it needs to be consistent with the rhythm and rhythm patterns of poetry will it try its best to search for them. Therefore, he found some articles in the Observer and rewritten them into poems.