每一种化合物都必须有确定的组成，这可以用其元素的符号来表示。

最好的性能改进是从非工作状态到工作状态的转变。

"The credibility of your results depends on the plausibility of your identifying assumptions."

The only impossible journey is the one you never begin.

The past is never dead. It's not even past.

复杂性理论告诉我们，并非所有问题都是平等的；有些问题本质上比其他问题更难。

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