external canal auditory的用法和樣例：
例句
- External auditory canal cholesteatoma is a rare disease entity.
摘要外耳道珍珠瘤為耳鼻喉臨床少見病例。 - Myxoma of the external auditory canal is so rare that data on its occurrence is not collected in the pathologic atlas of ear tumors edited by the World Health Organization.
摘要發生與外耳道的黏液十分罕見，文獻上均只見零星的報告，以至世界衛生組未將其列入所偏輯的耳科腫瘤病理圖譜中。
