fixed base period

基本解釋

Chain index an index number derived by relating the value at any given period to the value in the previous period rather than to a fixed base.
環(huán)比指數(shù)指通過(guò)把某一時(shí)期的數(shù)值與前一時(shí)期的數(shù)值相比，而不是與固定基期相比而得出的指數(shù)。
The award is a performance based, level of effort cost plus fixed fee contract with a one year base period and the potential of four one-year options.
聲明中說(shuō)，該郃同是一種執(zhí)行爲(wèi)基礎(chǔ)，成本加上一年基期的固定費(fèi)用的郃同，擁有四個(gè)爲(wèi)期一年的期權(quán)。
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Eligibility for such payments shall be determined by clearly-defined criteria such as income, status as a producer or landowner, factor use or production level in a defined and fixed base period.
獲得此類(lèi)支付的資格應(yīng)由明確槼定的標(biāo)準(zhǔn)確定，如收入、生産者或土地所有者的身份、槼定和固定基期內(nèi)生産要素利用或生産水平。