商铺英语情景口语50主题 ... After-sales Services（delivery，repairing）售后服务（送货、维修） Exchanges and refunds商品调换和退钱 Complaining about services投诉服务 ...
双语例句
1
There exists the exchangeofmaterials, energies and messages between heaven and mankind, soul and body, heaven and soul.
天人之间，性命之间，天性之间有物质、能量、信息的交换。
2
This would reduce import prices of food and raw materials and also curb the build-up of liquidity as a result of rising foreign-exchange inflows.
这将会降低食品和原材料的进口价格，同时抑制外贸顺差日益加大带来的流动性的积聚。
3
Mr Cotula’s study of land-deal contracts found few examples in which the foreign investor was obliged to exchangematerials or ideas with local farmers.