riflepit

例句：

1. 1. The soldier was cleaning his rifle pit with a brush.
   士兵用刷子清洁他的枪管。
2. 2.The hunter carefully inspected the rifle pit for any signs of damage.
   猎人仔细检查了枪管，看是否有任何损坏的迹象。
3. 3.The rifle pit is the critical part of the gun that holds the bullets.
   枪管是枪支的关键部分，它容纳着子弹。