indexes of seasonal variation

常見例句

雙語例句

• 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.
  測定季節(jié)變動對時(shí)間序列的影響，一般按同期平均法（原資料平均法）和趨勢剔除法計(jì)算季節(jié)比率。
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