短語詞組短語extrapolation forecasting method 外推預測法extrapolation absorption method 外推吸收法extrapolation distance method 外插法trend extrapolation method 分析法wave field extrapolation method 波場延拓法distinct periodicity extrapolation method 周期外推方法multiplicative extrapolation method 乘積外推方法adams extrapolation method 阿達姆斯外插法efficiency extrapolation method 傚率外推法 返回 extrapolation method