military activity in which soldiers, airplanes, etc., are sent to find out information about an enemyThere are two helicopters available for reconnaissance.reconnaissance missions
There are two helicopters available for reconnaissance.
reconnaissance missions
observation, surveillanceespionage, spyingcounterespionage, counterintelligence, intelligencecloak-and-daggertradecraftbugging, eavesdropping, wiretappingdope, goods, lowdown
in 1779
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。