地形伏大的山坡、山麓地区，反照率明显降低，山顶雪域分布区反照率显著上升。
Rough terrain areas have lower albedo, when albedo on snow area is much higher than other area.
在那个较晚的季节，这队人不久便走出了山麓小丘的潮湿、温和的地区，而到了内华达山干燥、寒冷、爽朗的空气里。
In that advanced season, the party soon passed out of the moist, temperate regions of the foothills in the dry, cold bracing air of the Sierras.
在那个较晚的季节，这队人不久便走出了山麓小丘的潮湿、温和的地区，而到了内华达山干燥、寒冷、爽朗的空气里。
In that advanced season, the party soon passed out of the moist, temperate regions of the foothills in the dry, cold bracing air of the Sierras.
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