上颚（mandibles，单数mandible），是一对位于上唇之后的锥状坚硬构造。
misc. the upper jaw
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你可以通过快速地用舌头摩擦上颚来帮助食物变暖，从而缓解吃冰激凌时的头痛。
You can improve an ice cream headache by rapidly rubbing your tongue across the roof of your mouth to help warm up things.
上颚也可能发生痉挛，但相对较少见。
Palatal enanthem can also occur, but is relatively uncommon.
射频消融柔软的上颚，清除挡住道路的组织；
radiofrequency ablation of the soft palate, which clears tissue out of the way;
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