spontaneousadj.自发的，自然的，本能的；自然产生的spontaneous diabetes自发性糖尿病spontaneous movement固有运动spontaneous adhesion自发附着spontaneous gangrene特发性坏疽spontaneous ovulator自发排卵动物spontaneous aneurysm[医] 自发性动脉瘤, 内原性动脉瘤spontaneous catalyst自发催化剂spontaneous breaking自发破裂spontaneous crawling自发性爬行spontaneous reaction自发反应