The best investment strategy is one that is based on sound principles and executed with discipline.

"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."

Re graphics: A picture is worth 10K words - but only those to describe the picture. Hardly any sets of 10K words can be adequately described with pictures.

绘画是一种语言，和任何语言一样，它有自己的语法和句法。

可能近似正确（PAC）学习的概念在计算学习理论中具有基础性意义。