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We know that for the above code, Xiao Hong subscribes to shoeObj, an object that buys shoes, but if we need to subscribe to buying houses or other objects in the future, we need to copy the above code and change the object code inside again. For this reason, we need to encapsulate the code.If the existing method needs to be improved when it is used, there are two methods at this time:我们还要假装交手一番，才更加像。周浩和徐宣要求姒摇尽快出兵，那也是认真考虑过了，为的就是每天能够多卖点。(1) Air damping type time relay is also called air bag type time relay. It delays according to the resistance generated by air compression. Its structure is simple, its price is low, and its delay range is large (0.4 ~ 180s), but its delay accuracy is low.　　影片改编自詹姆斯·达什纳撰写的同名反乌托邦科幻小说三部曲的第二部。　“干将莫邪”是春秋时期铸剑大师干将、莫邪夫妇呕心沥血、用生命和旷世爱情冶铸而成的雌雄神剑。后因吴王逼追此剑，干将莫邪不忍分离，两剑倏忽间化作清烟，消失在尘世之间。千百年来，人们纷纷寻找神剑的踪迹……