cannonball

A rusty iron cannonball was found embedded in the ancient stone wall of the fortress.

(Chinese) 在要塞古老的石墙里发现了一枚生锈的铁制炮弹。

In the museum, they display various sizes of cannonballs used during the Napoleonic Wars.

(Chinese) 在博物馆里，他们展示了拿破仑战争期间使用的各种尺寸的炮弹。