我的观点如下，仅供参考！
At first， books are likely to be out-dated, so It can't keep the pace with the development of the society。 We only can draw some lessons and acquire the theortical knowledge from books。
  
With competitive job market and constant change in our society, we need much more pratical knowledge instead of theory in books。
  
Secondly, theory must be connected with practice, and practice will be derived from our life and experience。Furthermore, practice will not only strengthen the availability of the theory, but also make up for the shortcomings of the theory。
  In general, A perfect theory should be on the basis of the long-term practice。
However,Gorge once said,"Books are steps towards the progress", From the view, we have to admit that books are very important to us。
   We must consider them as a good tool to learn more things。 Besides, in order to keep our knowledge practical and useful, we need fall back on our life and experience。