After they're worn for a while the muscles of the lips and cheeks will become adjusted, and a natural facial expression will return.
等到安上假牙之后不久，嘴唇和脸颊的肌肉经过调整之后又会恢复自然的表情。
The muscles of the facial expression are important for articulation involving the lips.
脸部的肌肉和嘴唇都是构成发音重要的部分。
The muscles of the facial expression are important for articulation involving the lips.
脸部的肌肉和嘴唇都是构成发音重要的部分。
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