—— 请按键盘 空白键 开始游戏 ——

When children do not have the ability to control the development of the time, "let the children want to do anything" is contrary to the concept of freedom.
当儿童还没有发展起控制能力的时候,“让儿童想干什么就干什么”是与自由观念相违背的。
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.
The propensity to truck, barter, and exchange one thing for another is common to all men, and to be found in no other race of animals.
Innovation is not just about technology; it's about changing the way we think and operate.