coal bed

 
       
  • n. 煤層

coal bed的用法和樣例:

例句

用作名詞 (n.)
  1. Coal seams intermixed with iron ore.
    煤層和鐵礦混雜在一起。
  2. Several coal beds are developed in backswamp deposits.
    河漫沼澤上發育多套煤層。
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