Preliminary study on the effect of Changjiang River-to-Weihe River Water Transfer Project on the scouring and silting in Lower Weihe River and on the falling of Tongguan elevation是什么意思_Preliminary study on the effect of Changjiang River-to-Weihe River Water Transfer Project on the scouring and silting in Lower Weihe River and on the falling of Tongguan elevation在线翻译_英语_读音_用法_例句