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我们虽然很想弄清楚，但也绝不会随意就领回一个儿子来。这街上到处都是人，夜深了还有许多人到处晃，它长了狗眼难道没瞧见么。她们把眉毛睫毛都刮了，有些难看。The template method pattern consists of two parts, The first part is the abstract parent class, The second part is the subclass of concrete implementation. Generally, the abstract parent class encapsulates the algorithm framework of the subclass, including implementing some common methods and encapsulating the execution sequence of all methods in the subclass. The subclass can inherit the parent class and rewrite the methods of the parent class in the subclass, thus realizing its own business logic.If a source address is repeatedly disguised, the address will be quickly detected and filtered out. In most cases, using many different source address camouflage will make defense more difficult. In this case, the best defense method is to block spoofed packets with similar source addresses as much as possible.The array in this topic is a sparse array and will not traverse (from indexes 3-9) "pits". These indexes do not exist in the array and will skip these pits directly. A value equal to undefined can never be filtered.