学习数学的唯一方法就是做数学。
"We live in a world where the past is always present, and the future is always uncertain."
死并非生的对立面,而作为生的一部分永存。
对于非礼的事,上等到的士人根本不想;对于非礼的事,中等的士人从来不说;对于非礼的事,下等的士人紧闭门户。
Innovation is not just about technology; it's about changing the way people think and work.