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
云修（马可 饰）是一名不温不火的小演员，个性耿直的他遭到了好友谢颐（纳瓦·君拉纳拉 Nawat Kulrattanarak）的陷害，于车祸之中差点丢掉了性命。神秘人的出现不仅挽回了云修的性命，还使他得到了一张完美无缺的英俊脸庞。
林佳乐、林佳琪、王志伟和江乘风，四名在不同领域的工程师，抱着同样为人类未来造福的梦想的同时，也寻寻觅觅地在这世界上找着自己梦想中的另一半，四人到底最终是否能梦想成真呢？梦想开始：佳乐渴望爱情，又害怕爱情，全因心中的“魔咒”作祟，担心一旦对身边男子有好感，对方便会遭到不幸，因此对男人，佳乐是望而却步，深怕自己会情不自禁喜欢上对方。佳乐第一次碰到志伟，对志伟却是厌恶到极点，误会志伟抢劫了了父亲王强。佳乐为了惩罚志伟，把志伟抢劫父亲的片段上载到网路，让志伟顿成了过街老鼠，人人喊打。没想到冤家路窄的两人，偏偏原来是同事。志伟不但是佳乐的新上司，佳乐还无意中救过志伟，可是佳乐从来没有告诉志伟真相，志伟也一直以为救他的是司徒艳。和佳乐不同，佳琪对爱情是充满理想的，可是期待的真命天子却迟迟未出现，直到那一天佳琪遇到了乘风。乘风到佳琪的公司维修机器，意外害得佳琪扭伤脚。乘风见佳琪受伤，好心送她到画室上课，不巧写生的模特儿没到，佳琪于是乘机报复，推乘风上阵。乘风受不了激将法，冲动答应，却没想到原来是充当人
俺答又来了么？嘉靖露出了像是听到蚊子嗡嗡声的表情。
方块学园，第二季8月精彩继续！全新的LOGO，全新的人设，全新的皮肤，全新的场景，为你良心呈现！！
C. Add yum source
）看着尹旭的表情，英布再一次感到错愕，问道：怎么？莫非兄弟知晓在下？尹旭摸摸后脑勺，心道：见到历史名人难免激动，这恐怕是穿越众共同的烦恼吧。
Analysis, on the other hand, is to conduct a more detailed study of the contents of a class and find their subtle and accurate differences so as to have a deeper understanding of things. It is a comprehensive ability to see that some of them have more connections and more common points from the numerous and complicated large number of things, so that they can be summed up together to make the large number of things that were originally scattered form systems and categories.
有一天，神秘的少女出现，魔王城大混乱没想到是养育孩子，陆续是来自恩特·伊斯拉的来访者果然不工作就不能支撑家庭开支…
…,那秦军的软肋是哪里呢？蒲俊瞧着碧波荡漾的河水，河边一座座高耸的仓房，猛然道：粮草。
1. The functions of a class need to be extended.
奶奶说话颠三倒四的，反而比没患病前风趣许多，也许之前就是太压抑了吧。无意间，奶奶说起自己年轻时的往事，说自己当年可是轰动一时的阿哥哥公主！参加阿哥哥舞蹈比赛后，得到冠军，是整条村子的风云人物，连当时“万草油大王” 的独生子“万草油王子”也对她有意思。Tango听了，根本不信，也不想去向爷爷求证，反正他对凶巴巴的爷爷没什么好感。
3. Not grasping the opportunity, In June, The surrounding farmland drains water, Add in half of the high temperature water, Not catching and selling shrimps in time, Causing a great deal of damage, Before that, a small cage can be filled in an hour or two. A ground cage can catch dozens of catties at a time. Later, in July, I bought another 40 ground cages, and on the first day I caught more than 100 catties. Later, it was basically 50 catties-30 catties-less than 10 catties per day. In mid-August, I drained the pool water, but I didn't see a few shrimps. This shows that lobsters died and ran a lot at that time, causing heavy losses.
你还是不是个男人。
瞧淼淼，那小手白嫩嫩的，就不像能干活的样子。
共敖严重过泛起一丝希望，问道：你说，我们还能够找谁帮忙？云浩，云青山。
Is to create a factory class to create instances of some classes that implement the same interface. First, look at the following diagram:
爱国志士沈木风受命铲除大汉奸易安之。策划“冷风暴”计划的邵一夫是一名与组织失去联系的老地下党，藏身于租界华人联盟，为铲除大汉奸易安之，用生命的代价，帮助沈木风顺利打入敌特工总部。让沈木风想不到的是，特工总部的二号人物杨云轩并不是汉奸，而是一名潜伏的地下党。杨云轩身负重任，他要求沈木风暂不要除掉易安之，而是潜伏在易安之身边，为党做更多的工作。沈木风在地下党人杨云轩、欧阳倩等人的引领下，多次完成上级交给的任务。最后，加入革命队伍的沈木风为了营救自己的同志，点燃炸药与敌人同归于尽。
