Treatment of wastewater is a seiff problem in Petrochemical industry,and recoverying floating oil is the most important problem in pollution control.是什么意思_Treatment of wastewater is a seiff problem in Petrochemical industry,and recoverying floating oil is the most important problem in pollution control.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句