In computer science, we often deal with problems that are easy to state but hard to solve.
在计算机科学中,我们经常处理那些容易陈述但难以解决的问题。
世界是一个舞台,我们都是演员。
Quality is not an act, it is a habit.
经济理论提供工具,但现实世界的测试会完善它们。