n.持槍者；槍手；持槍歹徒；職業(yè)殺手

The sight of the masked gunman made my blood freeze. 我一看見那個持槍的蒙面人就嚇得渾身冰涼。

He gazed fearlessly at the gunman. 他毫不畏懼地注視著那槍手。

He dodged to left and right as the gunman opened fire. 持槍歹徒開火時他東躲西閃。

The gunman is holding two children hostage in the building. 持槍歹徒把兩個孩子扣押在這座建筑物里當作人質(zhì)。