英语词汇closed book怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	closed book
释义	closed bookn. a subject about which one is ignorant 不知道的事，不理解的事
随便看	signet ring sign for significance significant significant figure significantly signification significative signifier signify sign in signing sign language sign-off sign off sign of the cross sign of the times sign on signor signora signorina I.Min.E. imine imitable imitate

英汉双解词典包含94788条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。