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幼年时，林佳因家中变故被父亲林世渊独自一人含辛茹苦带大。林佳长大后格外任性，做事不计后果。林世渊意识到女儿的问题，为挽救女儿，将其赶出家门，让她从基层职工做起，接受社会锻炼与改造。失去富裕生活的林佳负气出走、流落街头，被北京胡同里土生土长的快递员陈曦所救。普通的百姓生活让林佳无从适应，更惹出重重祸事。面对齐心协力共度难关的陈家人，林佳心底的善良被激发。陈曦对爱情、家庭的责任感教会了林佳如何重新塑造自己，也带领林佳用劳动创造价值。陈曦在日夜相处中改变了对林佳的印象，两人就此相爱。而此时，林佳昔日男友黄在远再次出手欲重新追求改头换面的林佳，林佳的亲生妈妈也从美国衣锦还乡，并试图让林佳重新过上不用劳动的生活，林佳和陈曦之间的感情变得岌岌可危。最终，林佳克服重重阻碍，奋斗成长为对社会有用的正能量女孩，也收获了和陈曦的爱情。两年前的全国游泳冠军赛上，实力相当的小海和阿若本打算在200米自由泳决赛中公平竞争，一同争取国家队入选资格。然而小海却意外失利，无缘站上领奖台，并在赛后不告而别。阿若误以为小海故意让贤，耿耿于怀。两年后，阿若在药检审查期返回原籍训练，小海也被普高劝退转学至乐海体校。再次成为队友的两人各怀心事，阿若冷漠执拗，小海游手好闲，二人矛盾不断升级。幸而在队医尤丹、队友小伙伴以及教练员的关怀与帮助下，阿若敞开心扉收获了友谊，小海也重新燃起了对游泳的热情。最终冰释前嫌的两个少年，在队友与师长的欢呼声中，再次并肩站上了全国赛的出发台……B) Design principles. Many people have listed seven principles, such as single duty principle, opening and closing principle, Richter substitution principle, dependence inversion principle, interface isolation principle, composite reuse principle and Dimit principle. LSP, I elevated it to one of the three cornerstones of the object-oriented paradigm; Single responsibility and interface isolation are mainly used as the principle of responsibility division in object-oriented analysis/OOA, which you can not pay much attention to at this time. Relying on the inversion principle, I throw it away as garbage, because the opening and closing principle or directly "relying on abstract type principle" already contains the essence of relying on the inversion principle, while the dross of relying on the inversion principle is inherited by IoC. Of course, the pullback, I emphasize very much. Therefore, you need to master the abstract dependency principle (OCP), one-way dependency principle (including the learning of callbacks) and the minimum dependency principle (composite reuse principle, Dimit rule).　　Laughing主动接2. Enter the auxiliary function interface and click "Apply Two Places at once" in the options.也许会错过一个人，也许会放过一个人，也许会避过一个人，也许会让过一个人，暮然回首，坚定地抱住一个人，再也不松手。