energy sources

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  • un.能源;热源
  • Web能源资源;能源来源;能源宝盒
un.
1.
能源
2.
热源

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