—— 请按键盘 空白键 开始游戏 ——

Mathematics is the language with which God has written the universe.
我们的伟大社会怎么能容忍它的公民持续遭受不法侵害?犯罪分子必须被告知,当我们的安全受到威胁时,他们的公民权利也会被终止!
The Liskov Substitution Principle is a fundamental concept in object-oriented programming, stating that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.