—— 请按键盘 空白键 开始游戏 ——

"The human heart, at whatever age, opens only to the heart that opens in return."
定理是永恒的;它们的证明是短暂的。
The most advanced machinery means nothing without skilled hands to guide it.
我是一个乐观主义者。我相信人类智慧的力量能够克服挑战。