英语词汇“a closed book”的翻译、意思、用法、释义-英汉汉英词典

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；谜以上来源于：《21世纪大英汉词典》
随便看	saint joseph retort process saint jude saint-julien saint-just saint-just, louis antoine léon de saint-just, louis antoin léon de saint kilda saint kitts saint kitts-nevis saint laurent saint-laurent saint-laurent, yves saint lawrence saint lawrence seaway saint lawrence skiff saint leger saint-leger saint leger, the saint leonar saint leonard saint-leonard saintless saintlier saintliest saint like