ground to air data link
地空超短波数据链

ground to air missile weapon
地空导弹武器

Solar heating warms the martian atmosphere and causes the air to move, dust off the ground.
太阳照射使火星大气升温，引起空气流动，并将尘埃带离地面。

Oxygen in the air would taste of food oxidation, but also easy to bacteria breeding ground for corruption.
空气中的氧气会使食物氧化变味，也容易是腐败菌滋生。

Within two kilometers around the venue, the police cordon set up three from the ground to the air, 24hour alert.
后来法庭决定将警戒线范围缩小至距离围栏200米处。

Study On the Mode of Multilevel Gray Evaluation Method for the Ground to Air Missile Battalion to Mobile Transfer
地空导弹营机动转移多层次灰色评价法模型研究

Study on Orientation Model of Radar Station of Ground to Air Missile in Motional Campaign by Measuring the Distance of Aground Mark
机动作战地空导弹载波相位差分定位模型研究

Recently British Airways and Air France, the only two airlines that operate the 12 remaining Concordes, were forced by British and French regulators to ground their planes.
目前，这种飞机仅存12架，由英航和法航两家公司运营。最近，英法两国的航空管理部门强制两家航空公司停飞。