cannon

1. N-COUNT A cannon is a large gun, usually on wheels, which used to be used in battles. 大砲

The cannons boom, the band plays. 砲聲隆隆，鼓樂齊鳴。

2. N-COUNT A cannon is a heavy automatic gun, especially one that is fired from an aircraft. 機關砲

Others carried huge cannons plundered from Russian aircraft. 其他人扛著從俄國飛機上搶來的巨型機關砲。

3. PHRASE If someone is a loose cannon, they do whatever they want and nobody can predict what they are going to do. 隨心所欲的人

Max is a loose cannon politically. 馬尅斯是個在政治上隨心所欲的人。