名词
中文翻译：外鼻
同义词：
['external nasal opening', 'external nares']
例句：
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1.The doctor examined the patient's epistoma and found no signs of infection.
医生检查了病人的外鼻，没有发现感染的迹象。
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2. The artist painted a portrait of the patient's epistoma in vivid colors.
艺术家用鲜艳的颜色画了一幅病人外鼻的肖像。
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3.The patient was advised to keep his epistoma clean and dry to prevent infections.
病人被建议保持他的外鼻清洁干燥，以防止感染。