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原振侠是香港科幻作家倪匡以第三人称叙述的科幻冒险系列小说，主角是一名怪异经历颇多的医生。《原振侠系列》共有三十二部作品，从1981年脱稿的第一本《天人》，到最后一本《天皇巨星》，创作时间恰好是整整十年。与倪匡其他的系列小说相比，《原振侠系列》里更注重男女感情的描写，而且经常是一见钟情继而生死相许的恋情。而原振侠本人，虽然同时有三位绝色美丽的女朋友，却并不能得到真正的爱情，他的个性优柔寡断，不能完全接受与他相当现实的女朋友们。荧幕上的《原振侠》最为熟知的是1993年由黎明、李嘉欣、王菲等主演的电视剧版本。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　　他们每天都梦想自己能变成富人，搬到宽大的屋子居住。他们终于中了六合彩头奖，本来一家人想好好利用这一笔横财，没想到他们存放巨款的银行突然倒闭了。更祸不单行的是，他们变富人的消息招来了恶手——他们的小女儿被绑架了，全家人着急得不得了。他们又变回了穷人，该如何拯救至亲呢？李敬文看着这身材高大、黝黑粗糙的庄稼汉，心里暖暖的，用力点头道：嗳。(2) Fire safety assessment agencies can engage in regional fire safety assessment, social unit fire safety assessment, large-scale activity fire safety assessment, special fire design scheme safety assessment and other activities, as well as fire laws and regulations, fire technical standards, fire hazard rectification and other aspects of consulting activities.JIT production is a unique multi-variety, small batch, high quality and low consumption manufacturing mode gradually established by Toyota Motor Company of Japan according to its own characteristics. The basic principle of JIT production comes from the management mode of supermarket on demand, that is, the supplier delivers the goods to the required place at the specified time according to the requirements of order summons (Kanban). That is to say, only at the "required time, supply the required quality and quantity of products", specifically, the quality, quantity and time of the products processed or supplied in each stage are determined by the demand in the next stage. Therefore, JIT production refers to a kind of production mode in which machines and equipment with strong versatility and high degree of automation are adopted at all levels of production organization, aiming at continuously reducing costs, no waste products and zero inventory. In short, in the face of the changing market, we should provide customers with the required products and services at the lowest possible cost, in accordance with the required quantity and with perfect quality, so as to meet the needs of customers to the greatest extent.