Ozonation is also relatively effective in the process. With the reacting time is 2 hours and concentration of ozone is 13.1g/h, the final reduction of COD is 28.3%.是什么意思_Ozonation is also relatively effective in the process. With the reacting time is 2 hours and concentration of ozone is 13.1g/h, the final reduction of COD is 28.3%.在线翻译_英语_读音_用法_例句