spontaneous law自发法spontaneousadj.自发的，自然的，本能的；自然产生的Spontaneous circulation亚低温spontaneous termination自发终止spontaneous evaporation自然蒸发spontaneous oscillation自发振荡Spontaneous pneumothomx自发性气胸spontaneous -cmission非线性信号spontaneous laser pulse自发激光脉冲spontaneous pneumothrax自发性气胸Spontaneous infertility自发性不育症spontaneously breathing自主呼吸； 自发呼吸