Coordinating airline traffic on the ground is as complicated as managing the traffic in the air.

协调飞机在地面上的交通和掌控空中交通一样复杂。

《柯林斯英汉双解大词典》

What do you do when the data on your screen is wrong and air traffic controls, money, deployment orders and personnel have all been tampered with?

屈尔说，“当你屏幕上的数据错误，航空控制，金钱，部署顺序和人事一切已经收到干预，你会做什么呢？”

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The air sampled from the South Pole's clean air sector (a zone where air traffic, land vehicles, and even foot traffic is strictly limited) is touted as the cleanest air on Earth.

南极的洁净空气扇区(这个区域基本上没有任何空中，地面交通工具，甚至连行人都没有)被认为是地球上空气最干净的地方。

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The majority of the pollution is caused by vehicles on the road and experts say reducing traffic in the cities is the best way of improving air quality.

BBC: Air pollution fears in Leicester and Nottingham

That warning is followed by sounds of air traffic on the cockpit recording.

NPR: Moussaoui Jury Hears Tapes of Flight 93 Crash

On the tape, Sullenberger is heard issuing a "mayday" call and telling air traffic controllers the flight had lost power in both engines, Higgins said.

CNN: Investigators find feather, other evidence on downed plane