OSSabbr.航天科学局(=Office of Space Sciences)；战略物资局(=Office of Strategic Services)；开放源代码软件(=Open Source Software)Ossino奥西诺

1. Lesion of ossicular chain is a common ear disease impairing the sense of hearing.
   听骨链病变是导致患者听力水平下降的普遍病症。
2. Wheneer feasible, ossicular reconstruction was performed at the time of the initial surgical procedure.
   只要条件适宜，均在初次外科手术中同时进行听骨链重建。