书在我们的生活中起着很重要的作用。有时，一本好书可以改变我们的一生。我们能从书中学到很多知识。例如，我们从书中了解人生，了解生活，了解世界。看每一本书就像在跟一个好朋友交流。我们能从书中得到精神享受，它使我们快乐而充实。总之，书是我们生活中不可或缺的伴侣。 Book Book is playing an important role in our everyday life. Sometimes, a good book can change one's whole life. We can get much knowledge from a book. For example, we understand life as well as the world from a book. Reading a book is just as if we are communicating with a good friend. It makes us happy and contented. In short, book is an essentialcompanion in our life.