Does it give you the answer that you expected it to give? Often, in practical problems, you'll spend just as much time doing performance debugging. Why is it slow?

它返回了期待中的结果了么？通常,在实际的问题中你会花，同样多的时间在性能调试上,它为什么运行这么慢？

麻省理工公开课 - 计算机科学及编程导论课程节选

You get people around the world to think about these problems, these issues-- practical idealists who will study what works, who will study the best and through that,make a difference.

让全世界的人们思考这些问题，实际的理想主义者,研究可行的方法，研究最好的个体，他们会带来改变。

哈佛公开课 - 幸福课课程节选