关系模型基于谓词逻辑和集合论，为数据库管理提供了坚实的数学基础。
一个好的数学家是能看到定理之间类比的人；一个伟大的数学家是能看到类比之间的类比的人。
Because of its vitality, the computing field is always in desperate need of new cliches: Banality soothes our nerves.
We all owe death a life.
The design of learning algorithms should be guided by both theoretical insights and practical considerations.
每一个结束都是伪装的开始。
The best designs solve problems you didn’t even know you had.