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1·Interest is charged at a flat rate of 11%.

利息按标准比率11%收取。《牛津词典》

2·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》

3·A few states have a flat rate tax.

有几个州征收数额固定的税。

4·One Flat rate residential phone line.

一种包月制住宅电话线。

5·So is a flat rate credit card for you?

信用卡是这样的月租吗？

6·We pay a flat rate for every telephone call.

我们打电话每次付相同的费用。

7·I suggest we use a flat rate for the penalty.

我建议使用固定赔偿率。

8·We pay a flat rate for electricity each quarter.

我们每季度的电费是一样的。

9·We pay a flat rate for electric it each quarter.

我们每季度交回一数额的电费。

10·We pay a flat is flat rate for electric it each quarter.

我们每季度交回一数额的电费。