machine carbine

例句：

1. 1. The machine carbine was a popular choice for soldiers in the field.
   这种机器步枪是战场上士兵的热门选择。
2. 2.The soldier used his machine carbine to defend himself against the attackers.
   士兵用他的机器步枪保护自己免受攻击者的攻击。
3. 3.In the war, many machine carbines were destroyed by enemy fire.
   在战争中，许多机器步枪被敌人的炮火摧毁。