玩具空氣槍：airsoft gun

在youtube看影片看到的標題airsoft gun，點開才發現原來就是玩具空氣槍

但一查發現相關字還不少
air gun
bb gun
airsoft gun

首先air gun

An air gun (air rifle or air pistol) is a rifle or pistol which fires projectiles by means of compressed air or other gas, in contrast to a firearm which uses an explosion or combustion of a propellant. Air guns are used for hunting, leisurely recreational shooting (commonly known as plinking), and precision sports, such as the Olympic 10 m Air Rifle and 10 m Air Pistol events.

Most air guns use metallic projectiles as ammunition. Air guns that only use plastic projectiles are further classified as airsoft guns.

再來bb gun

BB guns are a type of air gun designed to shoot projectiles called BB after the Birdshot pellet of approximately the same size.

airsoft gun

An airsoft gun is a type of gun used for recreational purposes, and firing nonlethal projectiles.

原諒我懶惰，實在很欄得幫大家翻，我想這些應該一邊查字典都不難懂
不過我來額外補充一些東西(雖然也都在wiki的內容裡)，我們俗稱BB槍，是因為那個「BB彈」跟獵鳥用彈的BB等級大小接近(詳見wikipedia中bb gun條目的表格)，但其實BB彈有鋼製的，具有不小殺傷力。

空氣槍方面，實際上包含打獵用的空氣槍，台灣一般都直接把玩具空氣槍簡稱空氣槍，英文中則會分air gun跟airsoft gun，不過這也許跟台灣(大陸那邊應該也是)禁止私人持有真槍有關。