—— 请按键盘 空白键 开始游戏 ——

It takes considerable knowledge just to realize the extent of your own ignorance.
我不明白为什么人们害怕新想法。我害怕的是旧的想法。
Sustainability isn't a destination—it's a daily practice.
The mathematician's patterns, like the painter's or the poet's, must be beautiful.