I'm changing the cartridges, cover me.

我在换子弹，掩护我。

The cartridge of this machine needs to be replaced regularly.

这台机器的套筒需要定期更换。

I bought a brand-new cartridge in the department store.

我在百货商店买了一个全新的唱头。

He fired a single shot, then ejected the spent cartridge.

他射出一枚子弹 然后退出空弹壳

Change the filter cartridge as often as instructed by the manufacturer.

要按制造商要求的频率更换过滤套筒。

He aimed his rifle, fired a single shot, then ejected the spent cartridge.

他用步枪瞄准，开了一枪，接着排出了空弹壳。

He was attacked by a security man who tried to wrest away a gas cartridge.

一名保安袭击了他，那保安想抢走一个气罐。

While serving a compulsory stint in the military, Nurmi entered a 20-k march carrying a rifle, a cartridge belt, and a knapsack.

在军中服义务役的时候，努尔米带着一支步枪、一条子弹带和一个背包参加了20公里行军。

Cartridge fuse is a fuse cased in a tube.

筒式熔断器是套在管中的熔断器。