natural source

US 
UK 
  • un.天然源;天然污染源
  • Web天然光源;自然来源;天然来源
un.
1.
天然源
2.
天然污染源

Sample Sentence

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