The truth is: the natural world is changing. And we are totally dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.

书籍是灵魂的镜子。

不要施小恩惠而伤害整体，更不可以公济私。以常情宽恕别人，以道理约束自己。

现代密码学的挑战不仅是确保通信安全，而且要以既高效又可扩展的方式实现。