| 释义 | undercover work短语⁴²⁵⁴⁰ 基本英英近义反义Thesaurus
 秘密工作
 
 Noun:
 the act of keeping a secret watch for intelligence purposes近义词 spying间谍活动
 as in.espionage
 同义词 intelligencereconnaissance,shadowing,tailingsecret service,undercover operations,underground activities
 espionagenoun spying
 intelligence,reconnaissance,secret service,shadowing,tailing,undercover operations,underground activities
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