National Cattle Breeder's Association

例句：

1. 1. The National Cattle Breeders Association is a group of people who work together to improve the genetics of cattle.
   国家牛育种协会是一个致力于改善牛的遗传特性的团体。
2. 2. The National Cattle Breeders Association has been working on developing new breeds of cattle that are more resistantto diseases.
   国家牛育种协会一直在努力开发新的牛种，这些品种对疾病有更好的抵抗力。
3. 3. The National Cattle Breeders Association is responsible for regulating the breeding practices of cattle in the country.
   国家牛育种协会负责监管该国牛的养殖实践。