详细解释:n. 甲烷, 沼气
【化】 沼气; 瓦斯; 密封防火墙(采矿)
【医】 沼气, 甲烷
英语解释：
名词 firedamp:
a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air详细解释：
fire.damp
n.（名词）A combustible gas, chiefly methane, occurring naturally in mines from the decomposition of coal.沼气：一种在矿坑里由煤腐烂而自然产生的可燃气体，主要成分是甲烷The explosive mixture of firedamp and air.甲烷和空气的 * 混合物