Retracted nipple
[医] 乳头内缩
🧩 词语组成解析
retracted
[[ri'træktid]]
a. 可伸缩的
nipple
['nipl]
n. 乳头;<美>（奶品的）橡皮奶头;（枪炮的）火门;[机]喷灯喷嘴，螺纹接套;
🗣️ 情景例句
Enjoy!
那就享受吧.
You'll hurt your thumb, if you don't take care.
你不专心的话，就会伤到你的拇指。
How are you getting on with your English lessons?
你的英语课学得怎么样了？