两种货币相互交换，一定时间后，再重新换回。的翻译：Two types of currency exchange, after a certain time, and then back again. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

The two currencies exchange, after a certain period of time, re-exchange.

Two types of currency exchange, after a certain time, and then back again.

Two kind of currencies exchange mutually, after certain time, receives in exchange again.

Two currencies are exchanged, after a certain period of time, and then switch back.

Two types of currency exchange, after a certain time, and then back again.