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。

youdao

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

Engineers on the ground designed a way the astronauts could connect air-cleaning devices from the command module to the air system in the lunar module.

VOA: special.2009.07.22

Israel says its air and ground attacks are targeting only Hamas-related targets.

VOA: special.2009.01.10

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

Targets selected by the United States since the air operation began Sunday have included air defense facilities, ground-to-air missile sites, and command and control facilities of Afghanistan's ruling Taliban and the al Qaeda terror network.

CNN: President notifies Congress about troop deployment

Gogo's ground-to-air transmitters typically mandate evaluating service while jetting around the country above 10, 000 feet.

ENGADGET: Visualized: JetBlue and ViaSat test Fly-Fi in-flight WiFi... from the ground