They use organisms that have naturally evolved a way to genetically modify plants.

他们使用自然进化出一种方式来改造植物基因的生物。

Scientists first genetically modified some papaya plants so they were immune to the virus.

科学家首先对一些木瓜植物进行了基因改造，使其对病毒具有免疫力。

Mary-Dell Chilton and Rob Fraley both Americans, produced the first genetically modified plants using that technology.

玛丽-戴尔·克林顿和罗伯·佛瑞里都是美国人，他们使用这项技术开发出首个转基因作物。

The only difference is that in a genetically modified plant, scientists have made a few changes to the plant's DNA.

唯一的区别是，在转基因植物中，科学家对植物的 DNA 做了一些改变。