短語詞組短語seasonal index smoothness 季節(jié)指數(shù)平滑法index smoothness model 指數(shù)平滑模型index smoothness method 指數(shù)平滑法smoothness index 均衡指數(shù);平滑指數(shù)smoothness index si 平滑指數(shù)international smoothness index 國際平整度指數(shù) 返回 index smoothness