preferentialist关税特惠主义者preferentialadj.优先的；优待的；特惠的preferential elimination选择排除preferential arrangement优惠协议<安排>preferential evaporation选择性蒸发preferential reinsurance优先再保险preferential selectivity有择溶解度preferential interaction优先作用preferential association优先联会preferential sensitivity优先敏感性preferential segregation选择分离,偏向分离preferential temperature适宜温度