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Variable value:.;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:自己也发生了莫大的变化，当初混迹于此的时候不过是个小小的盗匪，如今再回来的时候已经贵为越王，成为这片土地的主人。项羽要对付齐国田荣，还要担心中原众多诸侯，陈平先生认为他不会也不敢在南方与我们开战。最后对张槐道：老王爷，可否容老朽见见红椒？张槐沉吟了一会，道：这只是小事。Tashi: I was very introverted, and then I saw the woman and thought it was.Type: Description of the data paradigm;