The key to artificial intelligence has always been the representation.

构思得好的东西表达得也清楚，表达的文字也很流畅。

The study of computational complexity is a journey through the landscape of mathematical logic and algorithmic theory.

幸运，其实就是准备遇到了机会。

The land teaches patience; the market teaches agility.

一个数学家的真正价值在于他们留下的问题。