—— 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.
井水越是甘甜,就越容易枯竭;树木越是高大,就越容易被砍伐。
音乐是我的避难所,也是我的战场。