您要查找的是不是：
- 时间优惠率time preference
- 关税优惠率tariff concession rate
- 优惠preferential
- 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：Do you find these rates economically worthwhile to postpone calls until during weekends:
- 费率rate
- 优惠的favourable
- 优惠政策preferential policy
- 不良率fraction defective
- 容积率volume fraction
- 倍率multiplying power
- 优惠价格favourable price
- 电导率electrical conductivity
- 税收优惠tax preference
- 市盈率p/e (price/earning) ratio
- 报废率scrappage
- 优惠条件soft terms
- 机率probability
- 导率conductance
- 点击率clicking rate
