详细解释:n. 燧石, 耐火石
英语解释：
名词 firestone:
a piece of flint that is struck to light a firea sandstone that withstands intense heat; used to line fireplaces and furnaces and kilns详细解释：
fire.stone
n.（名词）A flint or pyrite used to strike a fire.打火石：用于引火的火石或黄铜矿A fire-resistant stone, such as certain sandstones.耐火岩石：耐火石，例如某种沙石