口镜
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I nter-Oral Mirror 口内反射镜
throat mirror oral lens 口镜头
Try to find a tutor for the purpose of oral practice, if you could not find a tutor, try to use the mirror.
口语方面可以找个家教，如果没有，也可以用镜子代替。
youdao
Since long ago, oral cavity doctor generally all is USES mouth mirror creating disaster to carry on the inspection.
长期以来，口腔医生一般都是使用口镜来为患者进行检查。
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