ground feed

例句：

1. 1. The farmer used to groundfeed his livestock in the field.
   这位农民过去在田野里给牲畜进行地面饲养。
2. 2. The baby goats were groundfed with oats every day.
   小山羊每天被用燕麦进行地面饲养。
3. 3. Thepigs are ground fed on a dietof corn and soybeans.
   猪们以玉米和大豆为食，进行地面饲养。