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Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:故事将围绕林黛玉一生展开,讲述绛珠仙子到林黛玉的渊源直至林黛玉去世。该剧从黛玉在扬州写起，进贾府所遭遇的冷遇；患难中和宝玉的爱情；来至家族和宫廷的重重阻挠；宝黛在爱情中的成长和失落；家族覆亡中十二金钗命运的沉沦和逆转。该剧用亲民的通俗性叙述方式，又创造性的以脂砚斋的批语为依据，将残缺的情节重新织补，打造了一个红迷心目中期待已久的完整的红楼故事。《黛玉传》将使《红楼梦》以独特的视角和前所未有的清晰的故事性完美的呈现在观众面前。一直像公主般生活着的秦晴，忽然发现自己原来不属于这个养育了她12年的家；而贫困潦倒的米莉却咸鱼翻身获得了梦寐以求的荣华富贵。秦晴和米莉在回到了本就属于自己的位置后，开始了与之前有着天壤之别的生活。秦晴和哥哥秦朗从小就有着深厚的感情，即便是分割10年之后，双方都不能忘记彼此。但当秦朗带着未婚妻季芬芳归国再遇秦晴时，这对兄妹的感情渐渐转变成了爱情，而且越发浓烈。可秦朗最好的朋友、豪门子弟施昂此时也无法自拔地爱上了秦晴。秦晴一时无法在二人间做出选择，而就在她终于从迷茫的爱情中挣扎出来时，秦朗的车祸又给了她沉重的打击。这一突如其来的事件让所有人如梦方醒，最终有情人还是走到了一起。2. The company's hardware products are mainly Mac computer series, iPod media player, iPhone smart phone and iPad tablet computer. Online services include iCloud, iTunes Store and App Store.这话噎得书生直翻白眼，盯着他面前一堆鸡骨头和鱼刺。Article 30 Anchoring ships and grounded ships你们还当这是客栈呢？这是咱们家。