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Explain the template method mode, which means: in an abstract class, there is a main method, and then define 1... n methods, which can be abstract or actual methods, define a class, inherit the abstract class, override the abstract method, and realize the call to subclasses by calling the abstract class. First look at a diagram:航海王和之国总集篇合集，巴托的秘密房间系列在新的时代机遇下，姚远抓住商机，促成快递与电商携手合作上下游业务，打通产业链。面对资本和同行两个阵营的压力，面对昔日女神的相爱相杀，四十不惑的姚远选择勇敢面对。他用自己在商场上摸爬滚打出来的经验，结合政府的利好，打出了一组资本与平台、平台与市场创新融合的组合拳，在众人的瞠目结舌中，再次撑起创业大旗，也再次点燃了路晓欧的心。本剧由萧蔷，宁静，刘佩琦等主演。故事背景被安排在30年代，讲述了马帮头子董义和一生起起伏伏的命运，其间交织着他和果果、黑姑、尹家贤、十八妹四个传奇女子荡气回肠的爱情。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:　　不论是射击、跳水、体操还是乒乓球，喜羊羊和他的伙伴们都要面临智慧与毅力上的一个又一个挑战。对小肥羊馋涎欲滴的灰太狼和红太狼得知获得冠军就可以成为羊族族长，便乔装混入比赛企图夺冠统治羊群。整个故事充满悬念，那么最后桂冠将落入谁家呢