【正文】
ring /more effective than those secondhand/indirect knowledge/experience. Also, we can check the efficiency of the knowledge in books. Also, the knowledge got in books can be deepen through experience. Also, we can get deep impression on knowledge in books with experience. Only through practice can the knowledge from books impress us deeply. (4)In social practice we can surely make progress in both knowledge and ability. With social practice, we can improve our ability to use our knowledge actively. Then/Hence/Therefore/Thus,we are sure to make progress bothandthrough適當(dāng)擴(kuò)充 So we can