Xia Jun.1999.Quality evaluation of regional and ecological environment.Wuhan:Publishing House of Wuhan University of Hydraulics and Electric Power(in Chinese with English abstract).是什么意思_Xia Jun.1999.Quality evaluation of regional and ecological environment.Wuhan:Publishing House of Wuhan University of Hydraulics and Electric Power(in Chinese with English abstract).在线翻译_英语_读音_用法_例句