off the ground的用法和樣例：
例句
- A natural three-beat gait of a horse, faster than a canter, in which all four feet are off the ground at the same time during each stride.
疾馳，飛奔馬的自然的三步跑法，比慢跑快，在每次邁步時馬的四蹄都同時離開地面 - As the air craft moves forward, the air flowing over the wings produces lift to raise the aircraft off the ground, and keep it in the air.
當飛機向前移動時，機翼上方的氣流產生向上的力使飛機飛離地面保持在空中不墜。
