additional cannon pinion

例句：

1. 1. The engineer added an additional cannonto the armored vehicle.
   工程师给装甲车增加了一个额外的炮管。
2. 2. The soldiers weregiven additional cannons for their trainingexercises.
   士兵们被分配了额外的炮管用于训练。
3. 3. The battlefield was littered withadditional cannons, adding to thechaos of the battle.
   战场上散落着更多的炮管，为战斗增添了混乱。