bull kept for covering

• 种牛

bull kept for covering的用法和样例：

例句

1. Japanese scientists had successfully cloned the ancestral bull of a luxurious brand of beef, possibly opening the way to distribute cloned beef.
   日本科学家已成功复制一种可生产高档牛肉品牌的种牛祖宗，可能为行销复制牛肉铺路。