free choice grazing

• 自由放牧

free choice grazing的用法和样例：

例句

1. It's claimed that the fox is a predator, killing lambs and free range chickens and must be controlled.
   据说狐狸是一种肉食动物，会捕杀羊羔和自由放牧场的鸡，所以必须要控制。