Carbon monoxide (CO) and hydrocarbons (HC) in the exhaust emission of the idling gasoline automobiles badly pollute the environment.是什么意思_Carbon monoxide (CO) and hydrocarbons (HC) in the exhaust emission of the idling gasoline automobiles badly pollute the environment.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句