空中演习

例句：

1. 1. The pilot was instructed to perform an aerial maneuver.
   飞行员被指示执行一次空中机动。
2. 2. The bird soared high above the treetops.
   那只鸟在树梢上空翱翔。
3. 3.The plane circled the mountain top before landing.
   飞机在山巅盘旋后降落。