—— 请按键盘 空白键 开始游戏 ——

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.
每个圣人都有过去,每个罪人都有未来。
导演就是创造一个感觉真实和生动的世界。