—— 请按键盘 空白键 开始游戏 ——

The secret of change is to focus all of your energy not on fighting the old, but on building the new.
The study of mathematics is a constant dialogue between the concrete and the abstract.
SINCERITY. Use no hurtful deceit; think innocently and justly, and, if you speak, speak accordingly.
我不相信分散投资。我更喜欢集中在几个好主意上。