—— 请按键盘 空白键 开始游戏 ——

The power of mathematics comes from its ability to abstract and generalize, turning specific problems into universal truths.
Whenever two programmers meet to criticize their programs, both are silent.
We have forty million reasons for failure, but not a single excuse.
最好的儿童书籍是那些不会居高临下地对孩子说话的书籍。