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coal noun

  /koʊl/ , /kɐʉl/ , /kəʊl/ , [kʰoɫ] , [kʰɒʊɫ]
  • (uncountable) A black or brownish black rock formed from prehistoric plant remains, composed largely of carbon and burned as a fuel.
石炭, 煤炭
  • (countable) A piece of coal used for burning (this use is less common in American English)
  • (military slang, WWI, _, –, _, WWII) Bombs emitting black smoke on impact.
石炭
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