preferentialist关税特惠主义者preferentialadj.优先的；优待的；特惠的Preferential exchange rate for tourists优惠的旅游汇价Preferential elimination system of voting按选择次序淘汰投票制preferential principle of public interest公共利益优先原则Preferential Assignment Heuristic AlgorithmPreferential elimination system of counting按选择次序淘汰点票制preferential dissolution by hydrochloric acid盐酸优溶法preferential multiple attribute decision tables偏好多属性决策表