—— 请按键盘 空白键 开始游戏 ——

The deeper you go into mathematics, the more you realize how much remains unknown.
The dead are never really gone, they just change form.
我们不是七个人,我们是一体的。
The biggest risk is not taking any risk.
    ——杜先生晚年在香港,先生为中国抗战.赈灾慈善做出巨大贡献,晚年依旧气度过人,毁掉所有欠条。