When I turned round he was pointing a dirty great gun at me.

我转过身来，他用一支老大的枪对准我。

《牛津词典》

All the great articulation is here, and they gave him a gun.

所有伟大的衔接在这里，他们给了他一支枪。

youdao

Which might be a great advantage for quickly noting when a suspect is indeed armed. But can cause tragic overreactions when there's really no gun in sight.

当犯罪嫌疑人确实是武装分子时，这种反应可能是警职人员的一大优势，但也可能会导致他们对手无寸铁的人做出悲剧性的过激行为。

youdao

At 12:00 BST on Monday, a 41-gun salute will be fired from Hyde Park, along with a 21-gun salute in Windsor Great Park and a 62-gun salute at the Tower of London.

BBC: Queen to celebrate 87th birthday with family

In any case, liability coverage would offer great protection if a gun was lost, stolen or used by a third party to commit a crime.

FORBES: The Myth of Gun Liability Insurance

Still, you can see the irony here: A shooting claims a great deal of lives, fear increases that anti-gun legislation will follow and folks promptly head out to stock up.

FORBES: Fear About Gun Legislation Pushed Firearm Sales To Record High Last Month