cartridges
A cartridge is a metal or cardboard tube containing a bullet and an explosive substance. Cartridges are used in guns.
Only four of the five spent cartridges were recovered by police.
5个子弹壳中只有4个被警方收回。
A cartridge is part of a machine or device that can be easily removed and replaced when it is worn out or empty.
Change the filter cartridge as often as instructed by the manufacturer.
按制造商要求的频率更换过滤套筒。