名词
中文翻译：颚部
同义词：
['mandible', 'lower jaw', 'maxilla例句：1. The dentist was performing an extraction on her lower jaw.（牙医正在给她的下颌做拔牙手术。）']
例句：
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1. The dentist was performing an extraction on her lower jaw.
牙医正在给她的下颌做拔牙手术。
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2. She had a wisdom tooth that needed to be extracted.
她的智齿需要拔掉。
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3.The surgeon carefully removed the tumor from the patient's mandible.
外科医生小心翼翼地从患者的下颌中取出了肿瘤。