singlet tax

例句：

1. 1. The singlet tax is acontroversial measure that has been debated foryears.
   单税制是一项有争议的措施，多年来一直引发争论。
2. 2. The governmentproposed a singlet taxto reduce income inequality.
   政府提议实施单税制以减少收入不平等。
3. 3.The singlet tax was designed to encouragebusinesses to invest in research and development.
   单税制旨在鼓励企业投资研发。