Geometry has two great treasures, one is the theorem of Pythagoras; the other, the division of a line into extreme and mean ratio .

几何学有两大珍宝，其一是毕达哥拉斯定理，另一个是分一线段为中外比。

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Conclusions Moving seasonal mean ratio method could consider secular, seasonal, cyclic and random tendencies of time-series data together and could serve as a useful tool for prediction.

结论移动平均比率法综合考虑长期、季节、周期及随机趋势，预测效果较好。

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Conclusions Moving seasonal mean ratio method could consider secular, seasonal, cyclic and random tendencies of time-series data together and could serve as a useful tool for prediction.

结论移动平均比率法综合考虑长期、季节、周期及随机趋势，预测效果较好。

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