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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:所以现在的情况不要紧，君上可以放心。再说了，这个皇位就那么好？就算真有那么好。Then see if the startup container is running:1-Folium一次古怪的事故将住在郊区的少年保罗传送到了一个平行世界！这个世界中从未发生过工业革命，强有力的名为“Spellbinder、迷惑者”（也可以翻译成“咒缚”）的团体利用公众的恐惧和无知统 治世界。依靠少女瑞亚娜的帮助，保罗必须同时从两个世界寻求帮助，否则就会被永远流放在这个世界中。