步兵射击掩体

例句：

1. 1. The soldiers were trained to use the cover of the trenches for their rifle fire.
   士兵们被训练使用战壕作为他们的步枪射击掩护。
2. 2.During the battle, the infantry snipers used the cover of the trees to take out enemy soldiers.
   战斗中，步兵狙击手利用树木的掩护来打击敌人士兵。
3. 3. The soldier was able to move around the area without being detected by the enemy because of the effective cover provided by the trenches and trees.
   由于战壕和树木提供的有效的掩护，这名士兵能够在这个区域自由移动而不被敌人发现。