batter brace

例句：

1. 1. The soldiers fired their guns at the enemy.
   士兵们向敌人开火。
2. 2.He was hit by a mortar shell during the battle.
   他在战斗中被一枚迫击炮弹击中了。
3. 3. The artillery team is responsible for launching the main cannons.
   炮兵队负责发射主炮。