black coal

名词 n.
中文释义

英文释义

名词 n.
  1. Synonym of soft coal. countable,uncountable
  2. high-quality coal countable,uncountable
    — The drop in 1918 was also a fall in the production of black coal. In other words he losses were in the best coal, the gains in the poorer coal
  3. coal countable,uncountable

词形变化

black coals plural
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