投石器

例句：

1. 1. The archer aimed carefully and fired a stone at the target.
   弓箭手瞄准并朝目标射出了一块石头。
2. 2. The soldiers used stones to clear the path for their advance.
   士兵们用石头清理道路以便前进。
3. 3. The ancient city had many walls with stone gates.
   这个古城有许多带有石头门的城墙。