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That is to say, the less a class knows about the classes it depends on, the better. In other words, no matter how complex the dependent class is, the logic should be encapsulated inside the method and provided to the outside through the public method. In this way, when the dependent class changes, it can minimize the impact on the class.如此循序渐进自然是最好不过。进城打工的王大春长得英俊潇洒，父亲英年早逝，母亲守寡一生，将其拉扯长大。王大春长的像父亲，而母亲则很丑，所以王大春从小就很怕别人知道他有一个丑娘。王大春打工时与同在一个酒店打工的漂亮城里姑娘赵小旭相识后，由于已父母双亡的赵小旭特别注重男友及其家人的相貌，再加上王大春对赵小旭特别细心的呵护，两个人相恋了，深爱赵小旭的王大春因为虚荣心和因为有个丑娘而几次被女友抛弃的经历，使他向赵小旭隐瞒了自己的家中有丑娘的事实，说他自己也是父母双亡……A. Congenital or acquired abnormalities;只是，你问这个，干什么？徐涛疑惑道。废物原料走私又死灰复燃，仙海检验检疫局协同相关部门，张网以待！然而，行动失利，那个漏网多时的幕后人物再次隐入一片迷雾。循着线索，稽查科长丁达惊愕地发现，幕后人物竟是自己的同窗老友、回国投资的何立东！14.1 Unqualified skin and accessory diseases that are difficult to cure.