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carboniferous

adjective
🔊/ˌkɑːbəˈnɪfərəs/
🔊/ˌkɑːrbəˈnɪfərəs/
(geology地质学)
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  1. producing or containing coal产煤的；含煤（或碳）的
  2. Carboniferous
     of the period in the earth’s history when layers of coal were formed underground石炭纪的Topics Historyc2