谈谈你的老河吧！
The old river course has been filled up and remade into a driveway.
河流的故道已经被填平，修成公路了。
The sand stratum in old river bed is important factor affecting stability of dam.
古河道砂层的存在，是影响围坝稳定的主要环境因素。
The sand stratum in old river bed is important factor affecting stability of dam.
古河道砂层的存在，是影响围坝稳定的主要环境因素。
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