( hearing aids)
A hearing aid is a device which people with hearing difficulties wear in their ear to enable them to hear better.
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( hearing aids)
A hearing aid is a device which people with hearing difficulties wear in their ear to enable them to hear better.
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Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006