upper jaw

基本解释

Wang Na was born with no upper jaw bone or teeth, making eating and speaking very difficult.
王娜天生就没有上颌骨和牙齿，这使得她吃东西和讲话都很吃力。
“They already had teeth in the upper jaw, so they had the enamel, dentine and other necessities,” he said.
它们的上颌已经有牙齿了，所以长牙的必要条件已经具备，如牙釉质、牙本质和其他。
A Chinese girl has become the first person born without an upper jaw bone to have full successful reconstructive surgery, according to reports from China.
一名中国女孩儿成了上颌骨缺失的第一人。据来自中国的报道，她接受的骨骼再造手术获得了圆满成功。

Doctors removed some of President Cleveland's teeth and much of his upper left jaw.

Crucially, 62000 has a reasonably well-preserved upper jaw, which the type specimen lacks.
ECONOMIST: Human ancestry has just got more complicated
It cut through his upper jaw and skull bones, killing him.
FORBES: The Most Dangerous Power Tools
Equally significantly, a different computer reconstruction shows that the upper jaw of 62000 does not match another famous fossil from the area, known as KMN-ER 1802.
ECONOMIST: Human ancestry has just got more complicated