心理学是科学,教学是艺术;科学永远不会直接从自身产生艺术。
Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.
学习一种新编程语言的唯一方法是用它编写程序。
A book is a version of the world. If you do not like it, ignore it; or offer your own version in return.