The best way to learn AI is by doing projects and solving real-world problems.

A picture is a representation, an illusion, a piece of magic, so what you see is not what you see.

要理解一个地方，你必须首先理解它是如何形成的。

——序，姚伯麟《战后太平洋问题》，1919年9月

老年人相信一切，中年人怀疑一切，年轻人知道一切。