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积雪日数
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积雪日数
Encyclopedia
农学
积雪日数
释
snow-covered days
积雪日数
对于积雪日的定义,在中国积雪研究中存在两种标准,第一种是根据天气现象来定义,即当观测场上视野范围内一半以上被积雪覆盖时,就记为积雪日;第二种是根据积雪深度来定义,即当积雪面积达到观测要求,且其深度达到规定深度(例如0.5厘米以上深度的积雪)时,记为积雪日。
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neogene coal measures
Neogene Period
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neo-Hegelian ethics
Neo-Hegelianism
neo-Hegelian school of law
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neoid
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neo-Kantian school of law
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neolacto-series
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neolithic age
Neolithic and Chalcolithic Culture in the West Asia
Neolithic Archaeology in Korean Peninsula
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