lowland river

基本解釋

Russia falls nearly into two sections: a lowland west of the Yenisey river and uplands to the east.
地形：葉尼塞河把俄羅斯的地形分爲大躰相等的兩半，西邊爲平原低地，東邊爲高原山地。
In lowland country almost any spot on the ground may overlie what was once the bed of a river that has since become buried by soil;
低地區(qū)域上的任何位置可能就是曾經的河牀，後續(xù)被土壤覆蓋而變成現(xiàn)在的樣子。
In the south, the Shiwalik Hills are covered with dense forests, lowland river valleys, and mountains up to around 1, 500 m above sea level.
南部的Shiwalik山區(qū)有茂密的森林、低地的河穀，每座山的海拔都在1500米之上。