—— 请按键盘 空白键 开始游戏 ——

For systems, the analogue of a face-lift is to add to the control graph an edge that creates a cycle, not just an additional node.
"Every book is a door to another world, and every reader is a traveler."
Life is a series of endless repetitions, each more meaningless than the last.
The future of energy lies in diversification - no single source can meet all our needs.
文明不是继承的;每一代人都必须重新学习和赢得它。
The legacy we leave for future generations depends on the choices we make today.