美 [frʌnt tuːθ]
门齿：门齿（incisor）又称切牙、门牙，是最靠近嘴部正前方的一类牙齿，属于异齿型哺乳类动物独有的牙齿分类。
a tooth situated at the front of the mouth
同义词： anterior
... 门静脉portal vein 门牙 front tooth; incisor 蒙古斑Mongolian spot ...
... or 或者 forwards 向前地 front tooth 门齿 ...
He's got a front tooth missing.
他有一颗门牙掉了。
Another has a single front tooth.
另外一位门牙只有一颗。
To have one upper front tooth pulled out?
被拔掉一个上颚前门牙？
For example, how much would you have to be paid to have one upper front tooth pulled out?
比如，给你多少钱,你才愿意拔掉自己的一颗门牙？
公正课程节选 : 耶鲁公开课
Usually patients have less serious mutations: a single front tooth or a slightly deformed face.
Little girl, missing front tooth we parents are suckers for this stuff, and this little girl may as well be my own.
Another has a single front tooth.