n.冲撞；爆炸
动词bang的现在分词形式.
"Tie the door back-it keeps banging to and fro in the wind." "把门朝后绑牢，它在风里不停地来回砰砰作响。"
He was banging on the door with his fist. 他用拳头砸门。
We were banging away at the enemy. 我们乒乒乓乓向敌人射击。
