feed function

例句：

1. 1. The baby needs to be fed regularly.
   婴儿需要定期喂养。
2. 2. The animals are fed with a balanced diet.
   这些动物以均衡的饮食为食。
3. 3. The farmers feed their livestock with grass and grains.
   农民用草和谷物喂养他们的牲畜。