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Interpreter Pattern: Given a language, the interpreter pattern can define a representation of its grammar and provide an interpreter at the same time. Clients can use this interpreter to interpret sentences in this language. The interpreter pattern will describe how to interpret these statements using pattern design after having a simple grammar. The language mentioned in the interpreter mode refers to any combination that any interpreter object can interpret. In the interpreter mode, a hierarchical structure of command classes representing grammar needs to be defined, that is, a series of combination rules. Each command object has an interpretation method, which represents the interpretation of the command object. Any permutation and combination of objects in the hierarchy of command objects is a language.虞子期轻声劝慰，特意提到了范亚父的名字，还加重了发音，就是想要提醒项羽。Petit's family is not only cute in lo, but also cute in daily life.The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.　　反黑帮双雄王志淙（黄日华饰）与林永泰（陈锦鸿饰）同属O记部门，二人性格迥异，因此时常发生争执，但在工作上却不失为一对好拍档，是名副其实的欢喜冤家。乐安郡主对宁静郡主道：宁姑姑，听说，白虎将军还派人去湖州接亲长，要来京城跟张家会聚。