The technology could theoretically also fly jumbo jets, Harris says, allowing companies like UPS and FedEx to use drones instead of people to fly their planes.

哈里斯说在理论上无人机技术可以用于大型喷气式飞机，并且允许像ups，联邦快递使用无人机以取代人工驾驶他们的飞机。

youdao

Even by the 1960s, though, air travelers were mostly wealthy people or businessmen on expense accounts; most Americans still could not afford to fly.

可是，即使在1960年代，乘飞机旅客大多是能承担昂贵花费的富人或商务人士，许多美国人仍旧无力承担飞行的费用。

youdao

And as part of an international coalition, under a U.N. mandate that is almost unprecedented, we went in and took out air defense systems so that an international coalition could provide a no-fly zone, could protect -- provide humanitarian protection to the people on the ground.

WHITEHOUSE: President Obama News Conference

Another friend of mine used to maintain that airplanes stayed up in the air only because people believed -- against reason -- that they could fly: Without that collective delusion sustaining them, they would instantly plummet to earth.

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