firedamp (also damp)

n [U] gas in coal-mines, explosive when mixed in certain proportions with air; methane （煤矿中与一定比例的空气混合的）瓦斯; 沼气; 甲烷.

fire-engine, fire-engine (also appliance), fire-escape, fire-extinguisher, fire-fighter, fire-guard, fire-irons, fire-lighter, fire-plug, fire-power, fire-raiser, fire-raising, fire-walker, fire-walking, fire-watcher, fire-water, firearm, fireball, firebrand, firecracker, firedog, firefly, firelight, fireman, firemen, fireplace, fireproof, fireside, firewood, firework, firing, firing-line, firing-squad, firm, firmament, firmly, firmness, first, first aid, first and foremost,