解释：屋顶是否有漏洞，下面的人才知道。

大多数人都不是自己。他们的思想是别人的意见，他们的生活是模仿别人的生活，他们的恋爱只是引述。

Efficiency without ethics is a path to failure.

"The challenge in theoretical computer science is not just to solve problems, but to understand why they are hard to solve."

Trust the scientific process—it’s slow but it works.

The Internet is the most important single development in the history of human communication since the invention of the printing press.