Which contains conversion factors for converting between metric and american units 的简单的表,其中包含公制与美制计量单位的换算因子。
The new series has year 2000 as the base year . in the new series , indices for periods prior to 2000 are obtained by re - scaling the previously published series , which has 1990 as the base year , using a conversion factor derived from the levels of the old and new series in the overlapping period of 2000 二零零零年以前的新系列指数是将以往发表的旧系列指数(以一九九零年为基期)按比例换算得来,所用的换算因子是根据新旧系列在二零零零年重叠期间的数值而计算的。