batter of wall

例句：

1. 1.The soldiers fired their guns at the enemy.
   士兵们向他们的敌人开火。
2. 2. Thecannonballs wereflying through the air.
   炮弹在空中飞来飞去。
3. 3. Thesoldiers were firing their gunsat the enemy.
   士兵们正在向敌人开火。