coupling nipple

例句：

1. 1. She held her baby close to her chest as she nursed him.
   她抱着她的婴儿，把他放在胸前喂奶。
2. 2.The mother's nipple was the only thing that could comfort the child.
   母亲的乳头是唯一能安慰孩子的东西。
3. 3.The doctor examined the nipple and found it to be normal in size and shape.
   医生检查了乳头，发现它的大小和形状都正常。