The only real failure in life is not to be true to the best one knows.
教育不是为生活做准备;教育本身就是生活。
"We are all apprentices in a craft where no one ever becomes a master."
The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.
我们必须警惕保护互联网免受那些会滥用它的人的侵害。