A combination of higher summer temperatures and lower winter snowfall is causing the retreat.

夏季过高的温度和冬季降雪量减少的综合因素导致了雪线的后退。

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A combination of higher summer temperatures and lower winter snowfall is causing the retreat.

夏季过高的温度和冬季降雪量减少的综合因素导致了雪线的后退。

youdao