firs[计] 先前的
firn.枞树;冷杉;枞木
Firing Exercise射击演习
firing pin mark膛针痕
firt stabilizer减摇鳍
firing practice射击演习
firing training射击训练
firactal theory分形理论
firing pressure燃烧压力
firing position发射阵地
firing frequency放电频率
firing shrinkage烧缩