This principle underpins the EU’s refusal to import genetically modified (GM) foods from the US, where they are widely consumed. But senior members of the US Congress have stressed that a successful agreement must include opening the EU market to all US agricultural products.&#160;
这一原则便是欧洲拒绝进口美国转基因食品的基础，而在美国，转基因食品被大量消费。但美国国会的不少资深议员施压说，成功的协定必须包括欧盟市场向所有美国农产品开放。