Helicopters helped fire crews get a jump on the blaze.

直升机帮助救火人员控制住了火势。

《柯林斯英汉双解大词典》

Helicopters dropped water on the fire.

直升飞机把水掉在火上。

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Fire ladders were unable to reach the upper half of the building, and rescue helicopters were hampered by smoke.

当时，灭火的云梯不能到达大楼中部略上的位置，救援的直升机也因大火的浓烟阻挡。

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They are also setting backfires to clear away dry brush, and using helicopters and airplanes to drop water and fire retardant.

VOA: standard.2009.09.01

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

Rising violence in the past week, including fire from helicopters, has left the UN's observer mission in tatters.

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November 26, two Pakistani border posts about half a kilometer from the Afghan border came under heavy fire from NATO helicopters that had strayed across the border into Pakistani airspace.

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It's a battlefield where you have naval shore support fire coming in, helicopters operating and ordnance flying.

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