A pair of razorsharp incisor tasks jut forward from the lower jaw and grind against two blunter versions in the upper jaw . 象剃刀那样锋利的一对门牙从下颚向前突出,可以与上颚的两颗较粗钝的牙对称嚼食。
His mouth started to jut out , and his jaw got longer 他的嘴向前突出,下巴也变长了。
The central forward portion of the lower jaw 下巴下颚中间向前突出的部分
A projecting part , especially a nib 向前突出的部位,尤指笔尖
A projecting forward part , such as the front end of a ski 前端的突出部分向前突出的前端,比如滑雪板的前端