A firearm is a gun: a weapon that sends a bullet or shot out when you pull the trigger, using a small explosion inside the barrel.

A firearm is a gunfirearm 就是槍 a weapon that sends a bullet or shot out when you pull the trigger一種扣下扳機就會把子彈或彈丸射出去的武器 using a small explosion inside the barrel靠槍管裡的小爆炸來發射

People reach for this word when they want to sound careful or official — in laws, in the news, on airport signs, in police talk. In everyday speech most people just say gun.

People reach for this word when they want to sound careful or official人們想聽起來謹慎或正式時會用這個字 in laws, in the news, on airport signs, in police talk像法律條文、新聞、機場標示、警方用語裡 In everyday speech most people just say gun日常口語裡大部分人就直接說 gun

It covers the whole group: a small gun for one hand, a long gun for the shoulder, a hunting gun. It does not cover a bow, a knife, or a bomb.

It covers the whole group它涵蓋整個類別 a small gun for one hand, a long gun for the shoulder, a hunting gun像單手用的小型槍、扛在肩上的長槍、獵槍 It does not cover a bow, a knife, or a bomb但不包括弓、刀，或炸彈

Though actually, the fire here is not a campfire. It is the old idea of firing — sending something out with a bang. And arm here is an old word for a weapon, not the part of your body between your shoulder and your hand.

Though actually, the fire here is not a campfire不過其實這裡的 fire 不是營火的意思 It is the old idea of firing — sending something out with a bang是「發射」的古老概念，指砰一聲把東西射出去 And arm here is an old word for a weapon而這裡的 arm 是「武器」的古字 not the part of your body between your shoulder and your hand不是你肩膀到手之間的那個身體部位