black stone

US 
UK 
  • un.碳质页岩;黑石
  • Web黑岩石;黑石头;黑石集团
un.
1.
碳质页岩
2.
黑石

Sample Sentence

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