trench gun

• 迫击炮

trench gun的用法和样例：

例句

1. The mortar ammo bearers should provide security to the gun team.
   迫击炮炮弹搬运兵应担负起炮组的保卫任务。
2. The trench mortars have begun to fire and the volume of sound increases.
   堑壕里的迫击炮早已开始了射击，声响愈来愈大。