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》

They leap to their feet, clench fists and let out long screams, clawing at the ground and air.

他们跳起来，握紧拳头，发出长长的尖叫声，抓向地面或空中。

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Coordinating airline traffic on the ground is as complicated as managing the traffic in the air.

协调飞机在地面上的交通和掌控空中交通一样复杂。

《柯林斯英汉双解大词典》

Yet up at about five-thousand-four hundred meters the air pressure is only about half of what it is on the ground.

VOA: special.2011.04.06

Then he flung outward, feet first, with a swish, Kicking his way down through the air to the ground.

然后，纵身一跳，他两脚先伸出去，在空中乱踢乱舞，于是飕的一声，降落到地面。

耶鲁公开课 - 现代诗歌课程节选

The jar was round upon the ground And tall and of a port in air.

圆圆的坛子置在地上,高高地立于空中。

耶鲁公开课 - 文学理论导论课程节选

The Seawolf submarine, the C-17 transport aircraft, several different air-to-ground and air-to-air missiles are in the cross-hairs.

CENTERFORSECURITYPOLICY: Center for Security Policy | FOR A CREDIBLE DEFENSE POSTURE IN THE FUTURE, INVEST IN THE B-2 TODAY

Coalition troops launched ground and air attacks in response, killing 55 militants and wounding 25.

CNN: 55 militants killed in Afghan coalition attack

To help protect the support units, leaders will designate ground and air tactical units to watch key areas.

CNN: Grange: Iraqis fight with 'economy of force'