unmanned air vehicle的用法和樣例：
例句
- The Air Force doesn't exactly want its drones powered bypurple bacteria.
空軍不是真的想用紫細菌來(lái)驅動(dòng)無(wú)人機。 - Even in war zones, the American air force is starting to worry about the danger of aircraft colliding with smaller UAVs.
甚至在戰爭區域，美國空軍也開(kāi)始擔心普通戰機會(huì )與稍小的無(wú)人機相撞。
