Heavy rain and melting snow have swollen the river to its highest level in decades.
暴雨和积雪融化已经使该河流水位到达几十年来的最高水平。
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Mark Serreze, director of the American National Snow and Ice Data Center (NSIDC) in Colorado, thinks that sea level rise is going to be a bigger and bigger problem, as we move through the 21st century.
Soon the trees would creep down into the snow until only their tops stuck out, and then the tops would disappear too and everything would level itself off and be flat.