Teachers are the most important role models in schools, the most instructive examples, and the most vivid examples for students.
教师是学校里最重要的师表，是直观的最有教益的模范，是学生的最活生生的榜样。
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。
"The number one benefit of information technology is that it empowers people to do what they want to do. It lets people be creative. It lets people be productive. It lets people learn things they didn't think they could learn before, and so in a sense it is all about potential."
Change doesn't happen overnight, but every step forward is a step in the right direction.
I don't have a method. I have a madness.
For the knowledgeable, words are the best display.
Be kind, for everyone you meet is fighting a hard battle.