What about the next generation of air-traffic control systems that promise to use GPS satellites and radio transponders to warn all aircraft in a given area about the presence of others?

下一代的空中交通管制系统将会在一个指定区域中使用全球定位系统和无线电应答器来警告所有飞机关于其他飞机的位置。那么这个系统能做到吗？

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No area in the world is completely free of air pollution. We must take measures to control it.

世界没有不遭空气污染的地方，我们必须采取措施加以控制。

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The air filter element should be replaced after cleaning 3 times, and the cleaning cycle can be determined by the air quality of the usual control area.

空气滤芯通常在清洁3次后就应替换新的，清洁周期能够由平时驾驭区域的空气质量而定。

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What will be in demand are intercontinental air travel, remote area access where air strips are spotty, air traffic control networks, aerospace fasteners capable of holding together lighter, stronger composite structures, airplane maintenance and overhaul, jet engines and spare parts galore.

FORBES: Magazine Article

The accident happened in an area which is not under air traffic control, a FAA official who did not want to be identified discussing the details of the accident told CNN.

CNN: STORY HIGHLIGHTS

This is the area between the UK and France where aircraft are managed by air traffic control (ATC) operators in Guernsey and Jersey.

BBC: Channel Islands airspace controls reviewed