oil shale

US 
UK 
  • na.【地】油页岩
  • Web油母页岩;页岩油;页岩气油页岩
na.
1.
【地】油页岩

Sample Sentence

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