upper atmosphere

US 
UK 
  • un.高层大气;上层大气
  • Web高空大气;气圈大气;上大气
un.
1.
高层大气
2.
上层大气

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