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Swimmer's ear is an infection of the outer ear canal.
游泳性耳炎是一种外耳道感染。
youdao
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Birds are even more mysterious, because here we do not even see an outer ear.
鸟类甚至更为神秘，因为我们甚至看不到它们有一个外耳。
youdao
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Birds are even more mysterious, because here we do not even see an outer ear.
鸟类甚至更为神秘，因为我们甚至看不到它们有一个外耳。
youdao