Improving communications brought more trade and contract, but also more friction between social groups.

改善交流会带来更多的贸易和合同，但也会增加社会群体之间的摩擦。

youdao

Improving communications brought more trade and contract, but also more friction between social groups.

改善交流会带来更多的贸易和合同，但也会增加社会群体之间的摩擦。

youdao