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For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.　此剧讲述一个原本以善良闻名的家庭主妇因某种原因而不得不伪装成有着“魔女”恶名的双胞胎妹妹，过上双重生活的故事。第二次世界大战即将爆发时，一个富有的寡妇雇用了一名业余考古学家在她的庄园内挖掘墓冢。当他们做出历史性发现时，英国的过去和不确定的未来将遥相呼应。Deep Learning: There is a translated version in Chinese, but I don't really want to put it here, because this book is actually very theoretical. Some chapters are really good, and some places you will think, what is this? What's the use of this thing? Will turn the novice around. Everyone will buy a town venue first, look through what they don't understand, Google what they don't understand, read papers directly, read good blogs summarized by others, and so on. In short, as long as you can understand what you don't understand.Yang Zhifeng, a collection store specializing in socks, underwear and household clothing, has become a dark horse for Tmall's new retail.刑警队铁血冷面的副队周海龙屡破奇案，新警员顾胜男睿智机警却缺少经验，在侦破一起有关胡教授和稀土样本案件时，两人层层剥茧，终于锁定犯罪嫌疑犯罪份子“屠夫”团伙，却因胡教授之子小宝被“屠夫”绑架，生命遭遇生死威胁，导致案件更困难。由于顾胜男破案心切，不料中计，幸亏周龙海及时营救，并识破“屠夫”诡计，两人将计就计成功抓获了犯罪团伙，保护了胡教授和样本的安全。一名患有睡眠相位后移综合症的女性，遇到了她的一生挚爱。问题是，当阳光照耀时，他正醒着，而她却不是。