a river that has since become buried by soil
一条后来被土壤掩埋的河流
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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。
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