The reason of the strengthening of severe wind belt of low layer is due to the dynamicforce effect of upper layer jet and the transport effect of air particle of low latitude.

低空强风带的加强一方面由于高空急流的动力强迫作用，另一方面来源于低纬空气质点对强风动量的输送作用。

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Across the country, special fares were on offer in operation on public transport, exhibitions will show the effect of pollution on people and buildings, and new non-polluting types of transport will be on display.

BBC: News | Europe | Off the roads

"There's definitely a performance-enhancing effect if you use things that improve oxygen transport to the tissue, " says Larry Bowers, an expert on athletic drug testing and senior managing director of the U.S. Anti-Doping Agency.

FORBES: Magazine Article

The city's transportation agency, Transport for London, reported moderate traffic problems Wednesday morning as the rules went into effect.

CNN: First 2012 Olympics contests kick off