The interest is added to your account every year.
每年的利息都加到你的存款中。

The interest rate for the savings account is 4%.
储蓄存款的利率是4%。

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。

Tell me the current rate for RMB, please.
请告诉我人民币的现价。

What's your selling rate for RMB yuan in notes today?
你们今天人民币现钞的售价是多少？

What's the dollar going for today?
美圆今天的售价是多少？

Our buying rate for notes is 523 yuan for 100 dollars.
我们100美圆的现钞买入价是523元。

It's 200 French francs at today's selling rate.
今天的卖出价是200法国法郎。

The buying rate of U.S. dollar notes is 460 yuan per hundred dollars.
美圆现钞买入价是100美圆付460元。