a hen on

例句：

1. 1. She was a hen on the farm.
   她在农场上是一只母鸡。
2. 2.The hen on the coop is laying eggs.
   鸡舍里的那只母鸡正在下蛋。
3. 3.We need to feed the hen on and keep her healthy.
   我们需要给母鸡喂食并保持她的健康。