—— 请按键盘 空白键 开始游戏 ——

To understand recursion, one must first understand recursion.
With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how.
任何一个有智力的笨蛋都可以把事情搞得更大,更复杂,也更激烈。往相反的方向前进则需要天份,以及很大的勇气。
我不是商人;我就是生意,伙计!
Forgetting is not a memory problem; it’s an attention problem.