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》

The movable type printing, the compass (指南针) , gun powder and the paper making are called four great inventions of China.

活字印刷术、指南针、火药和造纸术被称为中国四大发明。

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

Under the new county law, Great Western Shows, which runs the gun show four times a year at the Pomona fairgrounds, can exhibit guns there but not sell them.

CNN: Los Angeles, Washington, take stand on guns