当我们进入21世纪时,很显然,为了保持空气质量,必须加强对越来越多的交通工具尾气排放的监控。HyOx公司总裁GeorgeUnzelman预言,“关于尾气排放的控制,油品和汽车两方面都将要走向现在认为可能是两个极端的境地”。他在NPRA年会上说,因为调合汽油会降低催化转化器的效率并因此 As we enter the 21st century, it is clear that in order to maintain air quality, it is necessary to strengthen the monitoring of more and more vehicles’ tailpipe emissions. George Unzelman, president of HyOx, predicts that “control of exhaust emissions, both oil and motor vehicles, will now move toward the two extremes that are now considered”. He said at the NPRA annual meeting that blending gasoline would reduce the efficiency of the catalytic converter and therefore