例句：

　　1、 The cartridge is ejected automatically.

　　子彈自動排出。

　　2、 The cartridge must be replaced at regular intervals.

　　彈藥必須定時更換。

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

　　他用步槍瞄準(zhǔn)，射出一枚子彈，然后退出空彈殼。