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The intermediary mode is also used to reduce the coupling between classes, because if there is a dependency relationship between classes, it is not conducive to the expansion and maintenance of functions, because as long as one object is modified, other related objects have to be modified. If you use the mediator mode, you just need to care about the relationship with the Mediator class, the relationship between specific classes and the scheduling to the Mediator, which is a bit like the spring container. Let's look at the picture first:神仙是信仰，在信仰面前，任何伎俩都是没用的。当车队走远之后，有个士兵回头看了一眼，摸着后脑勺心中嘀咕道：怎么这些车辆看着如此眼熟呢？旁边一人见他神情，调笑道：瞧什么呢？你小子可是羡慕人家彭家的富贵？告诉你个门路，听说彭家有个小姐正当嫁龄，好好争取一下啊。坏家伙迈克尔·伍兹想用一架能攻击的遥控赛车来搞破坏，计划用一场大爆炸将除他自己之外的所有人都送上西天。志良经过千难万险，最终瓦解了他的阴谋，将罪犯绳之以法。Khaki: Guava, wormwood, mango, water chestnut, etcBecause of the fear of death, people will have a bipolar tendency towards it. Either don't talk about it or be too romantic. But death is the ultimate powerlessness.