The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu
罗城某夜，刑警大队突然接到报警电话，有一个小区发生枪案。值班探长大刘和警员孟津赴现场，发现却是个杀狗案。看到别人都在忙大案，立功心切的年轻警官孟津感觉很委屈，但大刘说服孟津对该案进行详细查访。出发之前，大刘的儿子被人在校外打伤住院，大刘却没有时间去看孩子。雪上加霜的是，孟津的女友要求孟津调离刑警岗位，否则就分手。孟津向女友表示了抱歉，女友含泪离去。此时，市中心医院又发生持枪抢劫案。专案组对弹道进行了分析，大刘等人再一次发现“杀狗枪”的踪迹。医院抢劫案线索渐渐集中在了李成和身上，专案组通过上级在物力财力上的支持，运用科学技术手段、大量排查线索等方式对案件侦破有了新的进展。通过努力专案组进一步掌握了案犯情况，开始对重点地区加强警戒力量，最后将罪犯丁三等抓获。罗城恢复了往日的平静。
Diana希望有自己骄人的事业，更一直憧憬著有一个爱自己又有钱的好男人。社会经济自金融风暴后持续低迷，大小公司裁员「瘦身」，Diana 和酒店经理韦大汉亦不幸成为失业大军。电视台编导徐少侠、韦大汉以及其女儿千嬅期为了冲出困境，决定假扮夫妻参加比赛。「冒牌家族」一行四人到达电视台，悭钱生活开始。
心里不爽，脸上还是得装作若无其事。
我不服——一人疯狂地喊，玄武王府和陈家联手，诓骗我们。
对尹旭而言，齐国田荣对项羽开战是意料之中的事情，刚才他也已经猜到了几分。
Eight: Understand the policy pattern in javascript
一个穿着婚纱的女人突然跳进商店，一个身体健康的高级沉默寡言的Balikali女孩，我的妻子穿着哀悼服...
Copywriter: The star who once stood on the peak has become a disfigured down-and-out singer, who has wasted ten years and died once.
小葱还是那个小葱。
此剧讲述了关于中年上班族们为了在剧变的社会里生存而拼命工作的炽热生存记故事。
这样的时刻肯定是令人开心的，大伙捞鱼、烤鱼、吃鱼，直闹到月上中天。
身为人类海昕和夏凡，因为一次偶然的机会，得到了梦寐以求的魔法能量，并在魔仙希雅的同意下，成了小魔仙，和希雅一起守护人类世界和魔法海洋，她们在帮助希雅调查污染魔法海洋的海兽时，结实了海萤堡的海达王子及其他魔仙，众人在寻求真相路上遇到了很多困难，但大家团结一致，共同努力，一起渡过难关，随着调查的深入，真相一点一点浮出了水面，他们找到了被称为深点的海兽巢穴，在进入深点调查后，他们发现海兽竟然跟海萤堡失踪的国王和宝贝千年之星有着密切的关系，而整个海洋也面临被黑气污染的重大危机，为了拯救魔法海洋，魔仙们努力寻找消灭黑气的办法，最后海昕成功将千年之星净化，最后成功千年之星的能量净化了整个魔法海洋，不仅如此，海昕她们还找到了黑气的源头，顺利将其铲除，使人类世界恢复了安宁。
佟家在青河镇看上去是家大业大，风光体面，富贵显赫，内里却极不安牌坊下的女人宁。佟善群的二太太徐凤琴出身低微，是佟善群从妓院里把她娶回家的，所以，凤琴一直认为自己在家中没有地位，整天胡搅蛮缠的，不是找大太太素蓉的茬，就是看弟媳其贞碍眼。就连她刚满九岁的亲生儿子佟喜才迎娶进门的“大”媳妇方瑾，更是受尽了她的虐待和折磨。
这座城市的没有规则、自由自在、清新空气、游乐设施都是属于宝町独有的！
虽未说什么，但秦淼知道师姐心里烦，恰好她自己也闷坏了，便对丫头兰儿道：你家去瞧瞧，看咱们家人多不多。
界师是行走于阴阳两界的执事，须身具灵根，两世历练，三世可成。怨鬼迦南打碎冰魄晶，青冥火烧断奈何桥，枯藤老鬼解印而出，阴魂四溢作乱世间。界师后人梦无忧感应天道，预知界师现世。为了修炼聚灵大法，柳条成为迦南的索命目标。梦无忧神魂巡视，救出了意外进入阴界，具备因果的柳条，决定帮他除去迦南，却不知迦南乃是柳条前世的爱人……大战中，梦无忧和迦南两败俱伤，枯藤以迦南和苏羽童要挟柳条，柳条气冲霄汉，得到界师灵力，两界一场正义与邪恶的决战全面爆发……奈何桥上青冥火仍在燃烧，是以身饲桥还是置身事外，柳条需要做出自己的选择……
This trip to the countryside gave me a deeper understanding of the basic situation in our country's countryside. We all went to places with high incidence of cancer, and personality is Shexian, the place with the highest adjusted mortality rate in the country. After investigation, the local environmental pollution is relatively serious. Although there are "Top Ten Well-off Villages" and more factories have brought economic benefits, they have also brought great pollution to the local environment. In the past, farmers had to drink polluted water. At the moment, deep wells have been drilled to drink clean and sanitary water. However, many factors in various fields still cause the high incidence of cardiovascular diseases and cancer in the area. Some families have seen the phenomenon of "poverty due to illness and returning to poverty due to illness". The implementation of the national new rural cooperative medical system has effectively relieved the economic pressure of patients' families. To a certain extent, it has curbed the phenomenon of returning to poverty due to illness and causing poverty due to illness, promoted the development of rural health services, promoted the change of farmers' concept of seeking medical treatment, and also enhanced the image of the Party and the government for private affairs. However, many farmers still do not know enough about this policy.
