inferior breed

例句：

1. 1. The inferior breed of dog is more prone to health issues than the superior breed.
   这种劣质品种的狗比优质品种的狗更容易生病。
2. 2.The inferior breed of wheat has lower yields than the superior breed.
   这种劣质小麦的产量比优质小麦低。
3. 3. The inferior breed of cattle is less efficient at converting feed into meat.
   这种劣质牛群在将饲料转化为肉的效率上不如优质牛群。