cannon
/ˈkænən; `kænən/ n[C]
1 (pl unchanged 复数不变) old type of large heavy gun firing solid metal balls （发射实心金属炮弹的旧式）大炮.
2 (pl unchanged 复数不变) automatic gun firing shells (shell 3a) from an aircraft, a tank, etc （飞行器、 坦克等的）机关炮
two 20-millimetre cannon 两个20毫米口径的机关炮.
3 (in billiards) shot in which the player's ball hits two other balls one after the other （台球戏中）主球连撞二球. cannon, v (phr v) cannon against/into sb/sth collide heavily with sb/sth 与某人[某事物]猛撞.