几个世纪以来，印第安人发展了手语来传达人们感兴趣的现象。来自不同部落（FORTRAN，LISP，ALGOL，SNOBOL等）的程序员可以使用不需要他们在小马上扛黑板的程序员。

Time travel is the most frustrating thing in the world. You can't change anything, and you can't stop anything from happening.

Never use a credit card for credit. The only kind of credit， or debt， that is acceptable is debt to acquire something whose exchange value is extremely likely to increase， like in a home. The exchange value of most things diminishes or vanishes the moment you purchase them. Don’t be in debt to losers.

没有人关心你是否跳得好。只要站起来跳舞。伟大的舞者之所以伟大，是因为他们的激情。