花灯集英语字典

hard coal

H 开头单词

同根派生

     

英汉例句

  • Soft coal burns with more flames than hard coal.
    烟煤燃烧时火焰较无烟煤多。
  • We also supply blind coal and soft coal from China and Indonesia.
    煤炭产品主要是无烟煤与有烟煤等。