让轿车驶入每一个家庭,是中国人多年以来的梦想。当历史的车轮把我们带进新世纪的门槛时,这个梦想正在悄悄地变成现实。可是,我们在享受汽车带来的迅捷、舒适、方便服务的同时,另一种烦恼也不约而至:空气质量下降、污染不断加剧,造成这种恶果的罪魁祸首之一就是汽车排放的尾气。 Let the car into every family, is the Chinese dream over the years. This dream is quietly being turned into reality as the wheel of history brings us to the threshold of the new century. However, while enjoying the swift, comfortable and convenient services brought by cars, another kind of troubles are appearing: One of the chief culprits in the detrimental effects of air quality and pollution is one of the exhaust emissions from vehicles .