一天,马克·吐温上街散步,走进一爿书店。他看着书架上的书,随手取出一本他自己写的书。他问书店小职员这本书什么价,小职员回答后,马克·吐温接着说:“鉴于我出版了这本书,我理应得到50%的折扣的权利。”小职员同意了。“同时,我又是这本书的作者,”马克·吐温又说,“我应该得 One day, Mark Twain walked up the street and walked into a bookstore. He looked at the book on the bookshelf and readily removed a book he had written. He asked the bookstore staff about the price of the book. After the small staff answered, Mark Twain continued: “Given that I published this book, I deserve a 50% discount.” The small staff agreed. “At the same time, I was the author of this book,” Mark Twain said again. "I deserve it.