They could not provide adequate air cover for ground operations.

他们无法为地面作战行动提供足够的空中掩护。

《柯林斯英汉双解大词典》

The K-8s were jointly developed by China and Pakistan to support ground operations.

该机型由中国与巴基斯坦为了支持地面作战行动而联合研发。

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Attack helicopters and unmanned drones will increasingly be used to support ground operations instead.

作为替代品，攻击直升机和无人驾驶飞机将越来越多地被用于支持地面作战。

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General Petraeus appeared to be pointedly rejecting suggestions by some analysts, and some officials and members of Congress, that the United States should scale back its ground operations in Afghanistan and focus on air strikes and special operations missions.

VOA: standard.2009.09.23

The powered parachute can fly very low to the ground, and as slowly as giving officers a clear view during search and surveillance operations.

VOA: standard.2010.01.01

Attack helicopters and unmanned drones will increasingly be used to support ground operations instead.

ECONOMIST: The future of British defence

Helicopter and ground operations aimed at taking hold of "key terrain" began early Friday, said Maj.

CNN: Militants killed in Afghan action, U.S. says

But the important question now is what does Israel want to achieve from ground operations.

BBC: Hamas ready for bitter urban battle