三叉矛

例句：

1. 1. The ancient warrior used a triangular shield as his weapon.
   那位古代战士用一个三角形的盾牌作为武器。
2. 2. The archer aimed at the target with his three-pronged spear.
   这位弓箭手用他的三叉戟瞄准目标。
3. 3. The knight was armed with a tri-bladed sword and a tri-pronged shield.
   这位骑士装备了三刃剑和三叉盾。