英语词汇a 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	a closed book
释义	a closed book 完全不懂的学科；尚未揭开的秘密，不为人所知的事，无法理解的事(或人)；高深莫测的事物；谜
随便看	trierarchs trierarchy triers tries Trieste Trieste, Gulf of triester triestes Triestine trieteric trieterics triethanolamine triethanolamines triethanolamine stearate triethoxymethane triethyl triethylamine triethylamines triethylborane triethylene glycol triethylenemelamine triethylenetetramine triethyl orthoformate triethyl phosphate trifacial

英汉双解词典包含483723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。