The study on river reaeration is of great importance to the control of riverpollution. 河流复氧研究对于河流污染治理具有重大的现实意义。
Under the present favorable situation of hydropower development, it has great significance to reconsider the construction period of hydropower project. 在目前水电大开发的有利形势下，重新认识水电工程的建设工期，具有重要的现实意义。
