The PAC learning framework provides a formal way to analyze the efficiency and effectiveness of learning algorithms.

生活中最好的东西是免费的。

I could easily forgive his pride, if he had not mortified mine.

我们都面临着一系列被巧妙地伪装成不可能情况的伟大机会。

The key to good design is understanding forces.

别让恐惧阻挡你追逐梦想。