The Lisp language is designed to be extensible, and it is easy to add new features to it.
最高的真理不需要称扬,最善辩的不需要言说,最仁爱的不需要显摆,最廉洁的不需要谦让,最勇敢的不会造成伤害。
The boundary between physics and mathematics is not as clear-cut as one might think.