Meanwhile, free-trade negotiations seem to ignore historical trends. Developing countries’ international terms of trade have worsened: prices of primary commodities have declined in relation to manufactures, as have tropical agriculture prices against temperate agriculture, and prices of generic manufactures have fallen relative to output protected by intellectual property rights.
同时，自由贸易谈判似乎忽视了历史趋势。发展中国家的国际贸易条件恶化了：与工业品相比的初级商品价格下跌，热带农产品的价格相对温带农产品下跌，普通工业品的价格也相对于受知识产权保护的产品下跌。