单词	fifth column
释义	fifth columnˌfifth ˈcolumn noun [countable] a group of people who work secretly to help the enemies of the country where they live or the organization in which they work—fifth columnist noun [countable]
随便看	omniscience omniscient omnishambles omnivore omnivorous on on-air Onassis, Aristotle Onassis, Jackie on-board once Once in Royal David's City once-over oncologist oncology oncoming Ondaatje, Michael one O'Neal, Shaquille one another one-armed bandit one-dimensional One Flew Over the Cuckoo's Nest one-horse One Hundred and One Dalmatians

英语词典包含52748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。