coaleum

例句：

1. 1.The coal-powered engine is a popular choice for transportation.
   燃煤发动机是运输领域的热门选择。
2. 2. The coal mine was filled with the smell of burning coal.
   煤矿里弥漫着燃烧煤炭的气味。
3. 3. The coal-fired power plant produces electricity using coal as fuel.
   燃煤发电厂使用煤炭作为燃料发电。