You cannot get through a single day without having an impact on the world around you. What you do makes a difference, and you have to decide what kind of difference you want to make.
数学家们至今徒劳地试图在素数序列中发现某种规律,我们有理由相信这是一个人类思维永远无法穿透的谜题。
仁是爱他人,义是端正自己