In the back of the truck was a 12.7 millimeter rapid-fire machine gun.

在卡车后面有一只12.7毫米口径的速射机关枪。

youdao

They raked the streets with machine-gun fire.

他们用机枪在街上扫射。

《牛津词典》

It was machine gun fire.

是机关枪在扫射。

youdao

Authorities say they quickly killed two of the gunmen, but two others continued to fire machine guns in the extended battle in Pul-i-Alam, Witnesses say U.S.military helicopters were part of the response force, and one aircraft fired a rocket into a multi-story building which the insurgents had seized, used to launch their attack and had rigged with explosives.

VOA: standard.2009.08.10

When the machine guns opened fire, American soldiers began moving up San Juan Hill.

VOA: special.2010.07.15

He taught himself to be a pilot. During World War II, he designed a machine used to train military aircraft crews to fire guns at enemy aircraft.

VOA: special.2009.01.14

Unidentified assailants then opened fire with machine-guns and grenade-launchers, destroying one car completely, according to the official Abkhaz news agency, Apsnypress.

BBC: Abkhazia Georgia leader Ankvab escapes deadly ambush

He was fleeing to Tunisia with his family because there was no electricity in Tripoli and because Gadhafi's forces had opened fire with machine guns on a recent street protest against the power outages.

CNN: Libya seen through Gadhafi's keyhole

There was sniper fire and exchanges of small-arms and machine gun fire throughout the day around the sports stadium, where rebels had advanced on government lines.

CNN: Macedonia issues rebel ultimatum