Before the development of a mediun of exchange，people would barter to obain the goods and services they needed.的翻译：Before the development of a mediun of exchange，people would barter to obain the goods and services they needed. 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

前一个介质交换的发展，人们会以货易货obain他们需要的商品和服务。

Before the development of a mediun of exchange，people would barter to obain the goods and services they needed.

Before the development of a mediun of exchange, people would barter to obain the goods and services they needed.

The development of a mediun Before of barter exchange, people would to obain the goods and services they needed.

Before the development of a mediun of exchange，people would barter to obain the goods and services they needed.