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单词 black shale
释义

Definition of black shale in English:

black shale

noun
  • A dark-coloured, finely laminated carbonaceous shale rich in organic compounds.

Origin

Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London.

 
 

Definition of black shale in US English:

black shale

noun
  • A dark-coloured, finely laminated carbonaceous shale rich in organic compounds.

Origin

Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London.

 
 
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