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As a result, her daughter got polio and her leg was lame. Borrowed tens of thousands of yuan to cure the leg, but the result was still unable to recover. Every time I see her, my heart hurts. "Just because her parents wanted to save a little money, this sister was delayed all her life."　　曾是恋人关系的政宇和载熙重逢，履行任务中载熙陷入危机，政宇不顾性命去救她。勇冠重新把政宇叫到NTS，派他和前朝鲜情报要员基秀去阿尔及利亚完成特殊任务。政宇在机场看到基秀后大吃一惊，到达阿尔及利亚后，政宇在基秀的帮助下找到国际恐怖组织的根据地。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:你的师弟们死于东方不败之手。故事讲述一群高中二年生男女在友情,爱情,求学,社团,未来出路等方面的烦恼。故事的主角是在校风自由的樱彩馆高校就读二年级的女高中生?仓科泉,考试成绩总是全学年第一的她,却是班上最不擅长谈恋爱的女孩子。某天,泉的班上来了一名转学生?祖父江广树,但是祖父江却从转来的第一天就一直缺席,从未来过学校。全班都被这位没人见过的神秘转学生耍得团团转。　　恋人绝情，寡妇多情，爱人真情，三个女人一个硬汉，演绎着人间真善美、假丑恶。