简单的英语笑话:Ground Rules 基本原则

One of my favorite teachers at Southeast Missouri State University in Cape Girardeau was known of his droll（滑稽的） sense of humor. Explaining his ground rules to one freshman class, he said, "Now I know my lectures can often be dry and boring, so I don't mind if you look at your watches during class. I do, however, object to your pounding them on the desk to make sure they're still running."