premiumn.额外费用；奖金；保险费n.(商)溢价adj.高价的；优质的premium on bonds债券溢价premium on money贴水premium charging优惠收费premium benefits溢出效益premium discount保费折扣premium of trades交易溢价premium transport加价运输premium structure保费结构premium motor oil高级车用汽油premium insurance保险费