天空中乌云黑沉沉地压下来，发出隆隆声和噼啪声。The sky, swollen like a black bladder, rumbled and crackled.夜晚的寂静被远处车流的隆隆声打破。The silence of the night was punctuated by the distant rumble of traffic.卡车开走了，她听见卡车的隆隆声越来越远。The truck pulled away, and ...
Objective : To investigate the reasons of the second cholesteatoma of postoperative tympanoplasty.目的: 探讨单纯鼓室成形术后发生胆脂瘤的原因并提出预防措施.Objective To study the cause and treatment of external acoustic meatus cholesteatoma.目的探讨外耳道...