can·non·ball
noun/ˈkænənbɔːl/
/ˈkænənbɔːl/
- a large metal or stone ball that is fired from a cannon
（用旧式大炮发射的）铁弹，石弹 - Cannon were used to shoot cannonballs directly into castle walls.
大炮用于将炮弹直接射入城堡墙壁。
- Cannon were used to shoot cannonballs directly into castle walls.