1)feed up 供给食物/营养、养肥、使吃饱
She is too thin. Feed her up a bit.
她太瘦了,把她养胖点。
2)feed...on/with sth.用某物喂养
They live in small herds and feed with ostriches and other animals.
它们成小群地生活在一起,与鸵鸟和其他动物一块儿进食。
What do you feed the poultry on?
你们用什么饲料喂养家禽?
3)feed sth. to...用某物喂养
This spice is used particularly in poultry feed to deepen the colour of egg yolks.
这种香料尤用于家禽的饲料中,以加深蛋黄的颜色。