焦炭

例句：

1. 1. The factory produces a lot of coke for the chemical industry.
   这家工厂为化工行业生产大量的焦炭。
2. 2. The coal mine is producing coke in large quantities.
   煤矿正在大量生产焦炭。
3. 3. Coal smoke is a sign of pollution from burning coal.
   煤烟是燃烧煤炭造成的污染的标志。