1·Tax progressivity is often at odds with efficiency.
at odds with 教你一招 可译为“与...想牴牾” 改译：累进税往往同高效率相牴牾。
2·Case study on progressivity analysis of health financing is a component of Equity Research in health Areas.
“卫生筹资累进性分析案例研究”是“卫生领域公平性系列研究”的组成部分。
3·In practice progressivity has tended to imply more than one rate of tax, for instance, which is necessarily less simple than a flat tax rate.
事实上，累进税意味着不仅仅只有一个税率。例如，累进税一定没有固定统一税率那么简单。
4·Basing taxes partly on expenditure rather than just income would therefore go some way towards the ideal of progressivity over a person's lifetime.
就人的一生来讲，理想的累进税制度应该是基于支出不仅仅是收入。
5·To explain why, let us start with the premise that the defenders of any progressive tax have to give some principled account of the optimal degree of tax progressivity.
我们的前提假设是：累进税的支持者必须要对最优累进率给出有力的解释。