Anthracite
01
无烟煤, 硬煤
a type of coal characterized by its high carbon content, glossy appearance, and clean-burning properties
例子
Miners extracted anthracite from deep underground mines in the Appalachian region.
矿工们从阿巴拉契亚地区的深地下矿井中提取了无烟煤。
无烟煤, 硬煤
