优惠率preference: n. 1.优先选择;偏爱。 2.优先选择物,偏爱物。 3 ...rate: vt.,vi. 〔方言〕=ret. declared preference countries rate: 特别优惠关税税率marginal rate of liquidity preference: 边际流动偏好率marginal rate of time preference: 边际时间偏好率下载手机词典可随时随地查词查翻译