A firearm or cannon that shoots bullets or shells

• Any weapon that expels a projectile by explosive force

发射子弹或炮弹的火器或火炮

• 用爆炸力发射弹丸的武器

A tool that sprays, shoots, or applies a substance

• Examples include spray guns, nail guns, and glue guns

喷射、打入或涂敷物质的工具

• 如喷枪、钉枪、胶枪

To accelerate suddenly, especially a vehicle or engine

• To rev the engine hard

突然加速，尤指车辆或发动机

• 大力轰油门

To pursue or target someone or something aggressively

• To aim to defeat, attack, or obtain

积极针对某人或某事；狠抓以达成目标

• 意在击败、攻击或获取

Informal: a skilled shooter or an expert hired to help

• A mercenary or specialist brought in to achieve results

非正式：熟练枪手或受雇的专家

• 为达成目标而被请来的能手或雇佣兵