—— 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.
The best businesses don't just adapt to change—they drive it.
The world is beautiful, but it has a disease called man.
在计算机体系结构中,唯一不变的是变化。
The greatest thing you'll ever learn is just to love and be loved in return.
——1945年4月接到希特勒已死的消息时说