Hu G,Wu Y Q,Liu B Y et al.Short-term gully retreat rates in the rolling hills of the black soils in NE China.Catena,2007 (in press).是什么意思_Hu G,Wu Y Q,Liu B Y et al.Short-term gully retreat rates in the rolling hills of the black soils in NE China.Catena,2007 (in press).在线翻译_英语_读音_用法_例句