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air defence

US 
UK 
  • na.防空
  • Web空防;对空防御;防空部队
na.
1.
防空

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Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard
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