三旬
三旬
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炎暑惟兹夏,三旬将欲移。
This sweltering heat will take its leave of us , the summer months will not want to stay .
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预报结果表明,三种方法的旬和月平均预报均超过惯性预报的水平,其中以后两种方法为佳。
The forecasts of 10-day and 30-day average by using three methods mentioned above , especially the last two , have an improvement over a persistence forecast .