spontaneous menu自动菜单spontaneousadj.自发的，自然的，本能的；自然产生的spontaneous avalanche-like fission reaction瞬时突变裂变反应Spontaneous intracranial hypotension syndrome原发性低颅压综合症spontaneous lymphocyte-mediated cytotoxicity自发性淋巴细胞介导细胞毒性spontaneous osteoporotic fracture of the sacrum骶骨自发性骨质疏松性骨折Spontaneous regression/complete resistance mouse肿瘤自发性消退/完全抵抗（SR/CR）小鼠spontaneous consecutive premature ventricular compleses自发性连续性过早室性综合波