As he watched jets fly overhead, an idea came to him to use weather balloons to fly.
他看到喷气机从头顶飞过，就想到可以用气象探测气球来飞行。
In just a few minutes, your correspondent witnessed a transport plane taking off, three fighter jets roaring overhead and a military helicopter rumbling to life.
就在几分钟内，笔者亲眼目睹了一架运输机腾空而起，三架喷气战斗机在头顶呼啸而过，一架军用直升机在隆隆上升。
There's the occasional background rumble of aircraft, Nato jets flying overhead.
偶尔还有北约飞机在空中飞过的声音。
As he watched jets fly overhead, an idea came to him to use weather balloons to fly.
当他看到喷气机从头顶飞过时，就想到可以用气象探测气球来飞行。
Checkpoints were established throughout the area, while helicopters and jets buzzed overhead.
这个地区全面建起检查点。头顶是直升飞机和战斗机的轰鸣。
Checkpoints were established throughout the area, while helicopters and jets buzzed overhead.
这个地区全面建起检查点。头顶是直升飞机和战斗机的轰鸣。
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