她把肘弯支在膝头上，掌心托着下巴颏，摇晃着一只脚，神气满不在乎。
She had set her elbow on her knee and her chin in her hand, and she swung her foot with an air of indifference.
下牙槽神经的终末支颏神经和切牙神经分别走行与上述两管内。
The inferior alveolar nerve at the end of mandibular canal is divided into two branches: the incisor nerve and the mental nerve.
同时，面动脉、颏下动脉、舌下动脉的穿支之间存在丰富的吻合。
There were multiple anastomosis between perforators from the submental artery, facial artery, and sublingual artery.
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