例：由于干旱，黄土高坡上的几条河流已经干涸了。
Eg: Rivers on the Yellow High Land nearly dried up in the drought.
大量降雨会使河水上涨，而连续干旱又会使河流水位下降。
Heavy rainfall makes a river rise while continuous dry weather makes a river sink.
大量降雨会使河水上涨，而连续干旱又会使河流水位下降。
Heavy rainfall makes a river rise while continuous dry weather makes a river sink.
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