The owners, who have been robbed several times, have put a life-sized picture of a real policeman holding a gun in the window of the shop.

店主们多次被抢劫，他们在店铺的窗户上放了一张真人大小的警察持枪照片。

He is holding a gun.

他拿着一把枪。

There is a gun machine in the factory.

工厂里有一台炮机。

The sound of a gun echoed in the night.

枪声在夜晚响起。

She learned how to shoot a gun at the range.

她在射击场学会了如何使用枪。

Firing a gun in a crowded area is extremely dangerous.

在拥挤的地方开火是非常危险的。

The robber threatened the bank teller with a gun.

强盗用枪威胁银行出纳员。

The robbers threatened the store owner with a gun.

强盗用枪威胁了店主。

Operating a gun machine requires specialized skills.

操作炮机需要专业技能。

They held a gun to his head.

他们用枪指着他的头。