BB gun
noun/ˈbiː biː ɡʌn/
/ˈbiː biː ɡʌn/
(North American English)- a long, light gun that uses air power to fire small round metal balls. BB guns are usually the first guns given to older children when they are learning to shoot. They use them to fire at targets (= objects fired at for practice) and to shoot small animals.
BB枪：一种长而轻的枪，利用空中力量发射小的圆形金属球。当年龄较大的孩子学习射击时，BB枪通常是第一把枪。他们使用它们向目标射击并射击小动物。