—— 请按键盘 空白键 开始游戏 ——

书籍可以是镜子、窗户和滑动玻璃门。
"Books can be mirrors, windows, and sliding glass doors."
Teamwork is the yeast that makes the business rise.
"The best way to learn mathematics is to do mathematics."
你必须愿意失败,愿意犯错,并不断尝试。