The impact of Clean Air Act Amendments (CAAA) on petroleum refining industry was the main subject under discussion in the 90th NPRA annual meeting.是什么意思_The impact of Clean Air Act Amendments (CAAA) on petroleum refining industry was the main subject under discussion in the 90th NPRA annual meeting.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句