优惠率的英文: concessionary rate Premium Rate linked interest rate Open rate 参考例句: Do you find these rates economically worthwhile to postpone calls until during weekends 你认为以下不同时段的优惠率是否值得你把打长话的时间推迟到双休日 concessionary是什么意思: a. 让步的,特许的 n. 让步,特许 Some...