—— 请按键盘 空白键 开始游戏 ——

The most elegant proofs are those that reveal the heart of the problem with clarity.
勇气不是没有恐惧,而是尽管恐惧仍选择行动。
The architect must be a prophet... a prophet in the true sense of the term... if he can't see at least ten years ahead don't call him an architect.