Much of the air traffic at that time was between Croydon Airport and Le Bourget Airport near Paris,France.

VOA: special.2010.04.18

It's like air traffic.

就是航空一样。

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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。

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Other birds have spread quickly across areas with heavy air traffic.

VOA: special.2009.04.01

The European air traffic control agency Eurocontrol said only 6,000 flights would take place in European airspace Saturday - down from the 22,000 normally expected.

VOA: standard.2010.04.17

But air traffic controllers say they lost contact with the Twin Otter plane.

VOA: standard.2009.08.02

The most recent threat nearly got away. The 30-year-old Pakistani American was on board this flight, bound for Dubai when pilots heard this from Air Traffic Control: Federal agents stopped the flight and removed Shahzad, who managed to board the airplane despite being placed on a "no-fly" list hours before.

VOA: standard.2010.05.06

The International Air Transport Association this week said passenger traffic fell 11 percent in March because of the economy.

VOA: standard.2009.04.28