Deafness refers to the complete loss of hearing ability in one or two ears.

耳聋是指一只或两只耳朵的听力完全丧失。

Cochlear implant is a new technology to restore hearing ability to totally deaf people.

人工电子耳蜗是全聋人康复的一项新技术。

The noise levels of 20 cabins and the hearing ability of 53 crewmen (106 ears)were measured.

对海军某舰的20个部位进行噪声强度测定，并对53名舰员（106耳）进行了听力调查。

You should try to find some nice platform in library, for listening or training your hearing ability.

您应尝试在图书馆找到一些不错的平台，收听或训练您的听力能力。