firnn.粒雪;积雪
firn.枞树;冷杉;枞木
firry cortex海草
fir seed oil杉子油
firing squadn.行刑队;执行死刑的射击队
firing cable引燃电缆
firing-pin击针
firing craft烧结工艺
firing crack烧裂
firing delay点火延迟
firn and ice雪冰
firing error射击误差