求翻译：它里面有很多真实的对话，简单而且实用，适合初学者。当你买了这本书以后，书店老板会送给你一本书，使你更好的理解这本书的内容是什么意思？

It has a lot of real dialogue, simple and practical, suitable for beginners. When you buy the book later, bookstore boss will give you a book so that you better understand the content of the book