Object:To observe the role of otoendoscopy in middle ear operation.

目的：观察耳内窥镜检查在中耳手术中的应用。

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He is also deaf in his right ear from the operation he had to remove the tumor.

因为割除肿瘤的手术，也导致了他右耳失聪。

youdao

He is also deaf in his right ear from the operation he had to remove the tumor.

因为割除肿瘤的手术，也导致了他右耳失聪。

youdao