reference period的用法和樣例：
例句
- This year the company wants to use a basis period different from that used in past years.
今年公司希望採用一個有別於以往的評稅基期。 - This research focusses on the index system establishment of multi-factors which sets the factors of the same measurement in the same period in a fixed base period.
本文對多因素指數體系編製採取了將同度量因素所屬時期一律固定在基期。
