—— 请按键盘 空白键 开始游戏 ——

Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country.
数学不知道种族或地理界限;对于数学来说,文化世界是一个国家。
如果没有蝴蝶,没有毛毛虫,还会有谁来看我呢?你离我那么远……至于大动物,我才不怕呢,我有我的力爪啊。
Pros are just amateurs who know how to gracefully recover from their mistakes.
To be at home everywhere is to be at home nowhere.