我们不能改变过去，但我们可以改变对过去的看法。
We cannot change the past, but we can change our view of it.
Each generation takes the earth as trustees.
Don’t tell people how to do things, tell them what to do and let them surprise you with their results.
Language is not a tool for describing reality, but a reality in itself.
NP完全性的概念为理解计算问题的复杂性提供了一个强大的工具。
Be kind，for everyone you meet is fighting a hard battle.
嫉妒的人像敌人一样折磨自己。
每一个挑战都是学习和成长的机会。
写作是一种更强烈地体验生活、赋予生活更多意义的方式。