Every great discovery in science has been preceded by some preparatory work, often extending over many years.
科学上的每一项伟大发现之前都有一些准备工作，往往持续多年。
The concept of computational complexity is not just about how fast we can compute, but also about understanding the limits of what can be computed.
我拍电影不是为了给出答案，而是为了提出问题。
The best way to learn computer architecture is to build one.
解析：教导学生，不到他想弄明白而不得的时候，不去开导他；不到他想出来却说不出来的时候，不去启发他。