Pressure swing adsorption separation technology has been widely applied in industry, and has become a main air separation technology.

变压吸附气体分离技术在工业上得到了广泛应用，已逐步成为一种主要的气体分离技术。

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The article summarizes the characters, resources and action principles of main air pollutants, and it also discusses the effects on people's health.

论述了几种主要大气污染物的性质、来源及其作用机理，并探讨了大气污染物对人体健康的影响及危害。

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The article introduces the types and sources of main air pollutants in house decoration, the harm to health, and the measurement method and protective measures of these pollutants.

论述了居室装修空气中主要污染物的种类、来源和对人体健康的危害，介绍了这些主要污染物的测量方法和防治措施。

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Mister Zundt says diesel vehicles are the main cause of air pollution in Sao Paulo.

VOA: special.2009.09.07

At Rhein-Main Air Base in Frankfurt, flights increased dramatically from mid-afternoon Sunday to mid-day Monday.

CNN: Finally, troops leave Germany for Bosnia

About 4, 500 people work across the 1, 200-acre site (485 hectares), which is one of the Royal Navy's two main air bases.

BBC: No more job cuts at RNAS Yeovilton says Commodore Alexander

RHEIN-MAIN AIR BASE, Germany (CNN) -- Troops of the U.S. 3rd Corps Support Command already knew the drill by the time they headed for Hungary from Wiesbaden, Germany.

CNN: Finally, troops leave Germany for Bosnia