以下为句子列表：
英文: The risorius and the buccinator muscles assist in the retraction of the lips, as well as support entrapment of air within the oral cavity.
中文: 笑肌和颊肌帮助唇的收缩，也支撑了整个口腔的气体流通。
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英文: Anatomical study of the buccinator muscle and its clinical significance
中文: 颊肌的解剖学研究及其临床意义
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