clean air

US 
UK 
  • un.清洁空气
  • Web洁净空气;空气清新;纯净的空气
un.
1.
清洁空气

Sample Sentence

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