Fees are charged at a flat rate, rather than on a percentage basis.
费用按固定的费率收取,不是按百分比。
《柯林斯英汉双解大词典》
2
So it exchanged D-marks for Ostmarks at a rate that had no basis in economic reality.
把东德马克按照一定比例兑换西德马克,没有经济现实的基础。
3
They were worried that if the discount rate is fifty basis points below the Federal Funds rate then it's going to hit zero and that would be embarrassing; so they moved it.