face-up feed

例句：

1. 1.The baby cow was happily face-up feeding from the bucket.
   小牛犊正快乐地从桶里面朝上吃奶。
2. 2.The fisherman had to face-up feeding the fish in the net.
   渔民不得不把网里的鱼面朝上喂食。
3. 3.The baby bird was learning how to face-up feeding on its mother's breast.
   小鸟正在学习如何面朝上在妈妈的乳房上喂食。