—— 请按键盘 空白键 开始游戏 ——

You pray for rain, you gotta deal with the mud too. That's a part of it.
To understand psychology, observe behavior in its natural context.
要想成为最好的,你必须能承受最坏的。
The concept of a legal system presupposes the concept of a rule.
The PAC learning framework provides a formal way to quantify the learnability of a concept class.
写作的行为是一种乐观的行为。如果你觉得这无关紧要,你就不会费心去做。