—— 请按键盘 空白键 开始游戏 ——

Mathematics advances not by the efforts of individuals alone but through the collective work of generations.
现代教育者的任务不是砍伐丛林,而是灌溉沙漠。
Liberty is the right of doing whatever laws permit.
我不是说唱歌手,我是流行巨星。