地对空的英文：
ground-to-air

ground是什么意思：
n. 地面，土地
v. 着陆， 打基础
adj. 磨平的，磨碎的

on solid ground
在稳固的基础上

Their ship was grounded.
他们的船搁浅了。

The ground has thawed.
地面解冻了。

The beans are then ground and packaged for sale as ground coffee.
然后那些咖啡豆被磨碎，包装好作为咖啡粉出售。

He was lying flat on the ground.
他平躺在地上。

air是什么意思：
n. 空气；大气；天空；空间；微风；样子；神态；气氛
v. 晾；通风；广播

There was not a breath in the air.
一丝风也没有。

a nip in the air
空气中有一种刺肤的寒冷

To fish in the air
海底捞月

Clean the air intakes regularly for sufficient air flow
定期清理进风口以保证有足够的空气流量

The switch hovered in the air.
鞭子在空中摇晃。