at stud

例句：

1. 1. The farmer has built a new at stud to house his horses.
   农民建了一个新的牛棚来存放他的马匹。
2. 2. The stable is where the horses are kept during the day.
   马厩是白天用来存放马匹的地方。
3. 3. The at stud is well-maintained and provides excellent living conditions for the horses.
   牛棚维护得很好，为马匹提供了优越的生活环境。