Spontaneous SAH自发性蛛网膜下腔出血spontaneousadj.自发的，自然的，本能的；自然产生的spontaneous recurrent seizure自发性再发作spontaneous chemiluminescence自发的化学发光Spontaneous combustion nature自燃性spontaneous electric activity自发神经电活动,自发电活动,自发的神经电活动Spontaneous hypertension rats自发性高血压大鼠spontaneous symmetry breaking自发对称性破坏spontaneous activity emission自发辐射spontaneous crack propagation自发裂缝传播Spontaneous-ignition gangue自燃煤矸石spontaneous vesicle formation囊泡自发形成