spontaneousadj.自发的，自然的，本能的；自然产生的spontaneous heating自发热spontaneous allergy自发变态反应,自发性变态反应spontaneous current自然电流spontaneous vertigo[医] 自发性眩晕spontaneous leaning自发学习spontaneous wetting自发润湿spontaneous finance自然融资spontaneous inquiry自发询问spontaneous alumina自生Al2O3spontaneous rupture自发破裂