—— 请按键盘 空白键 开始游戏 ——

一幅图画是一个事实。
In computer science, we often deal with problems that are too complex to solve directly, so we break them down into smaller, more manageable parts.
Energy security is national security.
Stop helping God across the road like a little old lady.
Science is a collaborative effort spanning generations.
教育不仅仅是达到目的的手段,而是一个持续成长和发展的过程。