casing spear

例句：

1. 1. The hunter wasusing a casing spear to huntfor game.
   猎人正在用枪筒狩猎。
2. 2. Thesoldier had to use the casingspear to defend himself against the attackers.
   士兵不得不使用枪身来抵御攻击者。
3. 3.The archaeologists found a casing spear in the ruins of theancient city.
   考古学家在古城市遗迹中发现了一把枪身。