Parum proficit scire quid fieri debet
Parum proficit scire quid fieri debet, si non cognoscas quomodo sitfacturum. It avails little to know what ought to be done, if you do notknow how it is to be done. 2 Co. Inst. 503.
英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。