The nipples on someone's body are the two small pieces of slightly hard flesh on their chest. Babies suck milk from their mothers' breasts through their mothers' nipples. 乳头
noun [专属名词]乳头,奶头;奶嘴
Mrs. Arable found a baby's nursing bottle and a rubber nipple. 阿拉布尔太太找出了一个婴儿奶瓶和一个橡皮奶嘴。
I'm sure men who run shirtless also appreciate that it helps them avoid nipple chafing and the classic runner's T-shirt tan. 我确信那些赤膊跑步者也认为这样能帮助他们避免乳头摩擦,也不会有经典的T恤晒痕。