A proof is a device for convincing someone else that a mathematical statement is true.
I don't believe in eternity, but I believe in the trace.
你无法回到过去改变开头,但你可以从现在开始改变结局。
阿根廷,以格瓦拉名言“直到最后的胜利”为名的关于格瓦拉生平的记传片在布宜诺斯艾利斯首映,4万人云集首都足球场,各国歌手纪念