a walking dictionary

• He is what we call a walking dictionary
  他就是所谓的活字典。
• He is , as it were , a walking dictionary
  他可说是个活字典。
• He is , as it were , a walking dictionary
  他可说是个活字典。
• He is as it were a walking dictionary
  他可以说是一部活字典
• He is , as it were , a walking dictionary
  他可说是个活字典
• He ' s a walking dictionary . and by the way he ' s a great reader of your books
  他是一部活字典。顺便说一句，他还是你的重要读者。