a small part with a particular purpose , used in a larger piece of equipment , which can be easily replaced with another similar part
发音
例句
1. Unfortunately the 2G cartridge design is very difficult to set accurately. 不幸地2G弹药筒设计非常难正确地设定。 2. This rifle only holds one cartridge. 这支来复枪只能装一发子弹。