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frostless period in China
释义
frostless period in China
Encyclopedia
理学
中国的气温
释
frostless period in China
中国的无霜期
一年内终霜日与初霜日之间的持续日数。一年中春季最后一次出现白霜的日期称终霜日,秋季第一次出现霜的日期为初霜日。无霜期长短不含初、终霜日,各年的无霜期差异很大,通常以其多年平均值表示。
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