“贸易的”用英语怎么说？

货币兑换成本仍是跨境贸易的最大障碍之一。Currency-conversion costs remain one of the biggest obstacles to cross-border trade.她从政期间是自由贸易的主要倡导者。She was a leading exponent of free trade during her political career.西非是可可豆贸易的中心。West Africa was th...