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2. Avoid the infinite expansion of the Context, the logic of state switching is distributed in the state class, and the original excessive conditional branches in the Context are also removed.Source Port, Destination Port写一群农村姑娘忘我的劳动态度，在公社养猪事业中大胆革新的故事。Market Insight (STEP 3): Closing the performance gap can be achieved by strengthening the implementation of the strategy, while closing the opportunity gap requires new business design. However, the new business design needs to take market opportunities and customer needs as inputs. Market insight is to explore opportunities to achieve future strategic goals.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:To provide a consistent interface for a set of interfaces in the subsystem, Facade mode defines a high-level interface, which makes the subsystem easier to use.《西线兵魂》又名《西线兵车行》，主要讲述了我军官兵为打赢现代化战争在一次又一次的执行任务和演练实战中所发生的故事，由王强主演。