以下为句子列表：
英文: Background: Hearing impairment in children can hamper learning process in them.
中文: 摘要背景：小儿的突发性耳聋临床上罕见。
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英文: For patients with bilateral effusion for over 3 months and conductive hearing impairment of 20 dB HL or worse, surgical intervention should be considered.
中文: 病程持续3个月以上且无改善的趋势，合并传导性听力损失时，则开始考虑外科治疗。
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英文: Furthermore, trauma of the inner ear and auditory nerve resulted in hearing impairment is not negligible in patients with temporal bone fracture.
中文: 至于听力障碍方面，内耳或听神经受损致感音性听力障碍成分（即包括感音性及混合性听力障碍者）占了多数，表示颞骨骨折致内耳或听神受损之情形不容忽视。
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