gun for

基本解释

After years spent toting a gun for what he believes is a German crime syndicate, he wants out.
在佣兵组织中服役多年之后，他觉得那组织是一个德国犯罪团伙，于是决定退出。
It was a surprise to the world, a shock to many Americans, and the starting gun for the space race between the superpowers.
在冷战中，这个消息震惊了世界，并给美国人带来巨大冲击，同时也是两个超级大国间太空竞赛的发令枪响。
His next assignment turns out to be making a high-powered rifle/machine gun for a foxy female assassin (Thekla Reuten) who’s as enigmatic as he is.
他的下一个任务是为一位如狐女刺客（塔克拉·鲁藤）制造一把高性能来福枪/机关枪，她的高深莫测程度一点儿也不比杰克少。

Will you not vote for the killer if you already feel the cold steel of his gun against your head?"
There'd be certain activities perhaps, for example putting a gun to your head, that would put an end to your life.
也许会有某些特定的活动，比如用枪指着你的头，会结束你的生命。
耶鲁公开课 - 死亡课程节选
The police officer shouts for the brother, the non-retarded brother, to drop the gun.
警官要求智力正常的兄弟,把枪放下
耶鲁公开课 - 心理学导论课程节选

But I bought a gun for self-defense and carried it in the glove compartment.
NEWYORKER: Beginners