—— 请按键盘 空白键 开始游戏 ——

要理解递归,首先必须理解递归。
To understand recursion, one must first understand recursion.
透明度建立信任,尤其是在复杂且政治敏感的环境中运营时。
To every action there is always opposed an equal reaction; or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.