closed-flock breading

例句：

1. 1. The closed-flock breading method is widely used in the dairy industry.
   封闭式饲养方法在乳业中广泛使用。
2. 2.The closed-flock breading technique has been proven to be more efficient than traditional methods.
   封闭式饲养技术已被证明比传统方法更高效。
3. 3.The closed-flock breading system provides a controlled environment for animal growth.
   封闭式饲养系统为动物生长提供了一个受控的环境。