1. interest rate 利率

2. simple interest 单利

3. compound interest 复利

4. legal interest 法定利息

5. prime rate 优待利率

6. payable interest 应付利息

7. lending rate 贷款利率

8. usury 高利贷

常用句型：

1. What's the interest rate for the savings account?

储蓄存款的利率是多少？

2. Do you pay interest on this account?

这种存款付给利息吗？

3. Please tell me what the annual interest rate is.

请告诉我年利率是多少。

4. Interest is paid at the rate of 1% per annum at present.

目前每年的利率是1%。

5. It allows you to earn a little interest on your money.

这可使你从存款中获得一点利息。

6. The account carries interest of 4%.

该存款有4%的利息。

7. The interest is added to your account every year.

每年的利息都加到你的存款中。

8. The interest rate for the savings account is 4%.

储蓄存款的利率是4%。

9. It varies from time to time. At present it is 6%.

（年息）每个时期都不同，现在是六厘。