breeding field crops for resistance to diseases

例句：

1. 1. The breeder is responsible for selectingthe best animals for breeding.
   育种者负责选择最佳动物进行繁殖。
2. 2. Thefarmer raised a variety ofcrops to increase yields.
   农民培育了多种作物以提高产量。
3. 3. The scientistdomesticated a new species to adapt tohuman environments.
   科学家将一种新物种驯化以适应人类环境。