全面介绍了以美国、欧洲和日本为代表的三大汽车排放法规体系，并阐述了这三大排放法规体系各自的产生背景、演变历程及发展趋势。
A comprehensive introduction of the three main automobile emission regulation systems as representative of American, Europe and Japan and their background, evolution and developing trends are given.
全面介绍了以美国、欧洲和日本为代表的三大汽车排放法规体系，并阐述了这三大排放法规体系各自的产生背景、演变历程及发展趋势。
A comprehensive introduction of the three main automobile emission regulation systems as representative of American, Europe and Japan and their background, evolution and developing trends are given.
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