纸上谈兵终觉浅，绝知此事要躬行的意思：从书本上得到的知识终归是浅薄的，最终要想认识事物或事理的本质，还必须依靠亲身的实践。
几种英文的翻译参考：
1、What's learned from books is superficial after all.It's crucial to have it personally tested somehow.
2、Practice goes deeper than theoretic knowledge
3、No practice,no gain in one's wit.
