medium-weight calf

例句：

1. 1. The farmer bought a medium-weight calf for his farm.
   农民为他的农场买了一头中重量的牛。
2. 2.The calf was born with a medium-weight frame.
   这头小牛出生时体重适中。
3. 3. The farmer decided to sell the medium-weight calf for breeding purposes.
   农民决定出售这头中重量的牛用于繁殖。