短語(yǔ)詞組短語(yǔ)base -period weight index 基期加權(quán)指數(shù)fixed base period 固定基期;固定基期英語(yǔ)base period weight index [統(tǒng)計(jì)]基期加權(quán)指數(shù);基期權(quán)數(shù)指數(shù)base period productivity 基期産量chain base period [統(tǒng)計(jì)]環(huán)比基數(shù)selection of base period 基期選擇shifting the base period 改換基期 返回 base period