Removal rates of TN were all above 74% at various N:P ratios and almost up to 100% when TN and TP concentrations were 4.5mg/L and 0.3mg/L respectively.是什么意思_Removal rates of TN were all above 74% at various N:P ratios and almost up to 100% when TN and TP concentrations were 4.5mg/L and 0.3mg/L respectively.在线翻译_英语_读音_用法_例句