The concentration of EN in the water was relative stable and the remove rate of Egeria najas to EN varied consistently especially when at 0.10,0.50,1.00 and 1.50mg/L, namely increased at first and then declined.是什么意思_The concentration of EN in the water was relative stable and the remove rate of Egeria najas to EN varied consistently especially when at 0.10,0.50,1.00 and 1.50mg/L, namely increased at first and then declined.在线翻译_英语_读音_用法_例句