高空飛行的用法和樣例：
例句
-
飛機在三萬英尺的高空飛行。
The plane flew at an altitude of30000 feet. -
在高空飛行時要小心，因為飛機翅膀可能會凍冰。
Be careful about flying at high altitudes as the plane's wings might get iced up. -
要射中飛行中的小鳥，尤其是高空飛行的小鳥，非常困難。
It is difficult to shoot a flying bird, especially a small bird flying high up in the sky.
