两年前的科学论文称一种转基因玉米能够杀死黑脉金斑蝶的幼虫 ,由此引起关于转基因作物安全性的讨论接连不断。如今 ,新的研究表明 ,当初被称为有抗害能力的转基因玉米事实上对黑脉金斑蝶并没有影响。但是 ,这并不意味着转基因食品安全性的争论从此结束。这场争论的焦点是ＢＴ? Two years ago, a scientific paper called a genetically engineered corn that kills larvae of monarch butterflies, triggering a steady stream of discussions about the safety of genetically engineered crops. Today, new research shows that what was once called defensive maize actually has no effect on monarch butterflies. However, this does not mean the debate over the safety of GM foods ends. The focus of this debate is BT?