The exchangeofmaterial culture is bilateral. Europe, in return, had exported various commodities and plants through the Silk Road, meeting the needs of Chinese market.
物质文化的交流是双向的,欧洲也通过丝绸之路出口各种商品和植物,满足中国市场的需求。
3
The traditional impermeable hardening retaining wall cut off the exchangeofmaterial, energy and information between rivers and coasts, and hinder the mutual supply between river and groundwater.