Vehicle emission control, including encouragement to use pollution control devices on private vehicles and the conversion of mini-buses to liquefied petroleum gas instead of diesel fuel.是什么意思_Vehicle emission control, including encouragement to use pollution control devices on private vehicles and the conversion of mini-buses to liquefied petroleum gas instead of diesel fuel.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句