The Lisp language is designed to be extensible, and it is easy to add new features to it.

自由从来不是被压迫者自愿给予的，必须由被压迫者争取。

技术是工具，人才是核心。

As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.

局外人

Habit is far more dependable than inspiration. Make progress by making habits. Don‘t focus on getting into shape. Focus on becoming the kind of person who never misses a workout.

我们对明天的唯一限制是我们今天的疑虑。