每一个数学问题都是通向更深入理解世界的窗口。
写作就像在一面从不说谎的镜子前裸露灵魂。
"We have learned to love ourselves, so now I urge you to 'speak yourself.'"
It is one thing to show a man that he is in an error, and another to put him in possession of truth.
向一个人展示他在错误中是一回事,让他掌握真理是另一回事。
Sustainability isn't an option—it's a necessity for the future of dairy farming.