这位兽医专门从事大型动物护理，主要治疗牛和马。

The vet specializes in ___large-animal care, mainly treating cows and horses.

这位兽医专门从事大动物医疗，经常为农场里的牛和马看病。

The veterinarian specializes in ___large-animal medicine and often treats cows and horses on farms.