Now,a young pilot was trying to fly across Russia.

VOA: special.2009.03.18

Air traffic used to be everything flew to places local to it but now there's a system of hubs, Chicago O'Hare for instance or Newark where planes fly through.

以前的飞机都是飞往它的所属地,但现在的航空运输是一个由交通枢纽组成的系统，例如飞机会途经芝加哥O'Hare机场或Newark机场。

耶鲁公开课 - 心理学导论课程节选

"It's ready to fly, it's a completely autonomous electric airplane now, meaning that it has its own electronics battery and motor."

VOA: standard.2010.08.11

"We flew on it for a couple hours, and now it's 24 hours before we go fly again."

VOA: standard.2010.07.05