水笔芯的英文：
ink cartridge

There was an ink blot.
那儿曾有一块墨迹。

There's little ink in the ink bottle.
墨水瓶里几乎没墨水了。

Permanent inks: Inks which do not fade. Also called Lightfast inks.
耐久墨:不会褪色的油墨。亦称耐光油墨。

Ink receptivity: Uniform acceptability of ink on paper surface.
受墨度:纸面受墨的平均程度。

There was a stain of ink left on the desk.
桌上留有墨水的污点。

electric cartridge
带电体唱头

moving magnet cartridge | IM type cartridge
动磁式唱头

moving coil cartridge
动圈式唱头

The cartridge is ejected automatically.
子弹自动排出。

The cleaning cartridge will be made accessible.
可以清洗唱头。