说明：  Lisp是世界上最伟大的编程语言或它的支持者认为的Lisp语言的结构使得它很容易扩展语言，甚至实施全新的 没有从零开始的方言。
(Lisp is the world’s greatest programming language—or so its proponents think. The structure of Lisp makes it easy to extend the language or even to implement entirely new dialects without starting from scratch.)