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那好。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:The reason why the defense attribute is weak.徐风挂了电话，看季木霖发来的最后一条短信：『不想跟你这种见识浅薄的人交流。十四岁的少年，只觉得一股滔天的恨意在心中盘旋，各种不甘、不忿，催生了一粒叫野心的种子，被他投入埋在心底的永平七年那场大火，反复煅烧和熔炼。二姐姐说这是大哥和大姐，但对他来说，还是陌生人。在一所普通却又不平凡的大学内，班里的同学都是个性十足！有不学无术却永远年级第一的高冷校草，有爱学习却万年老二、长相小可爱实则脾气火爆的拽丫头，有性格软弱常陷左右为难的班长，有不食人间烟火、不是白莲花的“白莲花”，有黑长直女神外表却神经大条常出糗的班主任，有隐藏富二代身份却打扮土气像大叔的年轻体育老师，学生们总是调皮捣蛋恶作剧，老师们更是道高一尺魔高一丈，他们在欢闹中成长着。