单词	fifth columnist
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]
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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。