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开了一枪后，枪哑火卡住了。

The gun misfired after one shot and jammed.

《柯林斯英汉双解大词典》

他一枪就撂倒了那头熊。

He brought down the bear with a single shot.

《牛津词典》

It could mean "Shoot him, let him have it," or it could mean "Give him the gun, let him have it."

可以是说"开枪吧,给他一枪",也可以是说"给他吧,把枪给他"

耶鲁公开课 - 心理学导论课程节选

The retarded brother shouted, "Let him have it," whereupon the brother shot and killed the police officer.

发育迟缓的兄弟大喊,"给他一枪",于是他的兄弟开枪射杀了这名警官

耶鲁公开课 - 心理学导论课程节选

You can poison them, you can strangle them, you can shoot them in the heart.

你可以下毒或是勒死他们,你可以朝他心脏开一枪

耶鲁公开课 - 死亡课程节选