Even if your system is super efficient, you still pay the flat rate.

即使您的系统超级节电，您还是需要付固定的费用。

youdao

Russia overhauled its progressive tax system in 2001, dropping the top rate from 45% in 1999 to a flat 13%.

2001年俄罗斯喊停其颇为激进的税务体系，把1999年起实行的最高税率由45%降低至13%。

youdao

Macedonia joined the club at the beginning of 2007, but in Slovakia the populist-nationalist coalition that took power in mid-2006 made the resumption of progressive taxation one of its main campaign pledges although to date it has only opted for a modest tweaking of the flat-rate system set up by its pro-market predecessor.

ECONOMIST: Will more of eastern Europe adopt flat-rate tax regimes?

Sensibly, President Putin has thrown out many of these exactions and given Russia a single-rate, flat tax system.

FORBES: Fact and Comment

The tax rate could very well be a flat tax system of say 20% gross income.

FORBES: Guest Post: Tax Reform