preferential rate

基本解释

Mr Romney has pledged not to raise the preferential rate on capital gains and dividends;
羅姆尼已保証不會提高資本收入和股息的稅率；
Venezuela devalued the bolívar for the second time in a year, abolishing a preferential rate of 2.6 bolívares to the dollar and unifying the official exchange rate at 4.3.
委內瑞拉貶低玻利瓦爾滙率，這已經是一年中的第二次。這次廢除了原來1美元對2.6波利瓦爾，竝將官方滙率定在1美元兌換4.3強勢玻利瓦爾。
The maximum maturity of housing loans was extended from 15 years to 20, and a six-month preferential rate is applied.
把居民住房貸款年限從15年延長到20年，執行半年期貸款的優惠利率。

If there is going to be a preferential rate for capital gains, people are going to try to structure as much of their income to take the form of capital gain as possible.
FORBES: Carried Interest Debate Heats Up Without Much Light
The claim is that a preferential tax rate is a subsidy: renewables have preferential tax rates therefore they are receiving this subsidy.
FORBES: National Geographic's Howling Ignorance About Fossil Fuel Subsidies
The basic contention is that enjoying a preferential tax rate is equal to receiving a subsidy.
FORBES: National Geographic's Howling Ignorance About Fossil Fuel Subsidies