BOD_5/COD_(Cr) changed from 0.28 to 0.42. It is indicated that the biochemical treatability is obviously improved, which accelerates the process of subsequent aerobic treatment.是什么意思_BOD_5/COD_(Cr) changed from 0.28 to 0.42. It is indicated that the biochemical treatability is obviously improved, which accelerates the process of subsequent aerobic treatment.在线翻译_英语_读音_用法_例句