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Structural patterns, as the name implies, discuss the structure of classes and objects and are mainly used to deal with the combination of classes or objects. It includes two types, one is class structure pattern, which refers to the combination of interfaces or implementations by inheritance mechanism. The second is the object structure mode, which refers to the realization of new functions by combining objects. It includes adapter mode, bridge mode, decorator mode, combination mode, appearance mode, element mode and agent mode.　　米德威奇，一个上班族居住的英格兰小镇，自由开明、渴求进步，由各种小家庭和富人街组成。这里没有太多的事情发生，其中也有着充分的理由。所以不是你说和谈便能够和谈的。赛斯是一位天使，凡人看不到天使，只有将死的人才能看到他们。而天使的任务就是带走他们的灵魂。一天，赛斯出现在洛杉矶一家医院的手术间，医生正在极力抢救病人，但最终赛斯还是带走了他。Therefore, judging from the age, the name Stephen appeared early. PH changed to V (there is no letter V in Greek, and the one that looks like V is actually N), which is a later evolution and is mainly used in Denmark and Holland in Northern Europe.三军未动粮草先行，越国在这方面已经占了先机了。Henan Province