Historical and projected income figures for UNDP are traditionally expressed in nominal terms (that is, dollars at current value) and cannot capture the variation in the real value of UNDP income resulting from inflation and exchange rate variations.
18. 开发署以往和预测的收入数字历来以名义值（即美元现值）列报，不能反映出通货膨胀和汇率变动造成开发署收入实际价值的变化。