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 combustion depth自燃深度spontaneous Raman scattering自发拉曼散射Spontaneous hemopneumothorax自发性血气胸spontaneous heating material自发热材料spontaneous nuclear reaction自发核反应spontaneous breathing trials自主呼吸试验spontaneous vaginal delivery自然阴道分娩spontaneous evokedpotentials耳声发射，自发性spontaneous reporting system自愿报告制度spontaneous verbal utterance朴素的语言发声