adjustment for seasonal variation 季节性变动调整 indexes of seasonal variation 季节变动指数 index of seasonal variation 季节变动指数 ..
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Measuring the seasonal variation in a time series, we generally use two methods to calculate seasonal indexes—average of original data, trend adjustment for average.
测定季节变动对时间序列的影响，一般按同期平均法（原资料平均法）和趋势剔除法计算季节比率。
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