This will remove air pockets and help the sod make contact with the ground and take root.

VOA: special.2009.07.07

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

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

He's a man up in the air you know he's so detached he doesn't have his feet on the ground.

他是个生活在空中的人,十足超然,从不脚踏实地。

耶鲁公开课 - 政治哲学导论课程节选

When we have both our feet firmly on the ground, and when we are down to earth we do not have our noses in the air.

VOA: special.2009.03.08

Warm air rising from below causes the wind tube to reach toward the ground.

VOA: special.2010.05.11

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

VOA: special.2009.01.10

On May,22 they even launched a ground attack on Kandahar air field, NATO's sprawling military base outside the city.

VOA: standard.2010.05.26

"We're so much more visible from the air than we are from the ground that maybe we can be a deterrent,"

VOA: standard.2010.01.01

The U.S.defense secretary has rejected suggestions for a more limited approach emphasizing air strikes over troops on the ground.

VOA: standard.2009.09.22

WMO scientists assess and monitor air pollutants such as ground-level ozone,smog, particulate matter, sulfur dioxide and carbon monoxide.

VOA: standard.2009.03.23

"What is electric mobility going to give us? Not only on the ground but in the air?

VOA: standard.2010.08.11

The international forces will handle the two outer tiers on the ground and in the air for the thousands of polling stations nationwide.

VOA: standard.2009.08.16

The incident raised fears of another war. In 2006,a deadly cross-border raid by Hezbollah guerrillas sparked a 34-day Israeli air and ground assault on Lebanon.

VOA: standard.2010.08.05

The B-1 is a strategic bomber that was not originally designed to provide direct air support to ground forces, which was the mission in this instance.

VOA: standard.2009.06.08

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

"This was a hugely significant attack plan. With that number of aircraft, with the types of destination that were being talked about, it is conceivable to think of upwards of 2,000 casualties in the air depending on the point of detonation whether others would have been caught on the ground as well.

VOA: standard.2009.09.07