阅读短文，将文中划线部分翻译成中文。
Books are out best friends. They give us both knowledge and pleasure. With books, our life is interesting.Books are sogreat friends of ours that we can turn to them for help whenever we meet with difficulty.
However, we should make use of books. As there are bond of different kinds, we should read them in different ways.In my opinion, some books are to be read carefully and we must think over and learn something from them. Some should be just looked through. There are a few books that we should never read, for they are not good for us.The most important thing that wemust try to put what we learn from books to practice.