—— 请按键盘 空白键 开始游戏 ——

"A good book is a magic gateway to a world of imagination."
The pursuit of knowledge is a journey that never ends, and each discovery opens the door to new questions.
The pursuit of mathematical truth is a pursuit of beauty, elegance, and simplicity.
罗马帝国为什么垮台?什么是拉丁语办公室自动化?