Of the extrinsic muscles, the levator labii superioris alaeque nasi is the most important dilator.鼻外肌群中, 提上唇肌是最重要的扩张肌.It indicates that bollon dilator has good long term effectiveness for postoperative anastomotic strict...

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dilator的音标：dilator的英式发音音标为：[daɪ'leɪtə]dilator的美式发音音标为：[daɪ'leɪtə]...