concessionary rate of tax

例句：

1. 1.The government is considering a concessionary rate for the new tax law.
   政府正在考虑对新税法实行优惠税率。
2. 2.The company offered a concessionary rate on its energy bills.
   该公司为其能源账单提供了优惠费率。
3. 3. The concessionary rate was designed to encourage more people to use public transportation.
   优惠费率旨在鼓励更多人使用公共交通。