—— 请按键盘 空白键 开始游戏 ——

过去从未消逝,它甚至还未过去。
我们必须听取科学家和渔民的意见,以找到平衡的解决方案。
The Liskov Substitution Principle is a fundamental concept in object-oriented programming, ensuring that derived classes can be used in place of their base classes without altering the correctness of the program.