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算你有心，还带了车过来。听闻此乃越王卫队，是越国最精锐的兵力，今日之败倒也不冤枉。Therefore, learning design patterns, The first thing to do is to understand which aspects of design patterns are available to developers, Then, the principle, timing and method of each design pattern are studied respectively, that is to say, under what circumstances should a certain design pattern be used? When understanding the timing of a certain design pattern, it is also necessary to understand what consequences will be caused if this design pattern is not used at this time. After understanding the principle and usage of each pattern, more importantly, learning the object-oriented thinking mode, after mastering the object-oriented thinking mode, looking back at the design pattern, you will have a deeper understanding. Finally, learning the design pattern, you must study hard and practice more. "I agree with the last sentence very much."不能用美丽来形容她，事实上，她容貌算不得出色，还比不上她小妹子香荽。3. Reflection and amplification attack (DEDoS) (ack reflection attack, dns amplification attack)