博物馆展出了一门来自18世纪的大炮。

The museum displays an 18th-century ___cannon as part of its collection.

演讲者连珠炮似地抛出了一大堆数据。

The speaker delivered a ___barrage of statistics in rapid succession.

他用球杆同时击中两个目标球，完成了一次完美的双球碰撞。

He executed a perfect ___cannon by hitting both object balls with the cue.

他在台球比赛中打出了一个完美的连击，先击中红球再碰到黑球。

He scored a perfect ___cannon in billiards by hitting the red ball first and then the black ball.