名词
中文翻译：内唇
同义词：
['inner lip', 'innermargin']
例句：
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1. The car's internal lip is damaged, soit won't fit properly in thedoor.
汽车的内唇受损，所以无法正常放入车门。
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2. The artist used a pencilto draw the internal lip of the mouth.
艺术家用铅笔绘制了嘴巴的内唇。
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3.The book describes the process of how theinternal lip grows and develops.
这本书描述了内唇生长和发展的过程。