lowland river

基本解释

Russia falls nearly into two sections: a lowland west of the Yenisey river and uplands to the east.
地形：叶尼塞河把俄罗斯的地形分为大体相等的两半，西边为平原低地，东边为高原山地。
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;
低地区域上的任何位置可能就是曾经的河床，后续被土壤覆盖而变成现在的样子。
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山区有茂密的森林、低地的河谷，每座山的海拔都在1500米之上。