名词
中文翻译：唇系带
同义词：
['lip frenulum', 'lip ligament']
例句：
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1.The labial frenum is responsible for supporting the upper lip during chewing.
唇系带负责在咀嚼时支撑上唇。
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2.During the development of the child's mouth, the labial frenum plays a crucial role in forming the upper lip.
在孩子口腔发育过程中，唇系带在形成上唇方面起着关键作用。
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3.The labial frenum is often visible when the upper lip is raised or when the teeth are shown.
当上唇抬起或露出牙齿时，唇系带常常可见。