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outside air

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UK 
  • un.外界空气;室外空气
  • Web户外空气;外部空气;洁净空气之气源为外气
un.
1.
外界空气
2.
室外空气

Sample Sentence

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