spontaneouslyadv.自发地；自生地；自然产生地spontaneousadj.自发的，自然的，本能的；自然产生的spontaneous operation自发式运行spontaneous attention自发注意spontaneous hepatitis自发性腹膜炎spontaneous induction自然诱发spontaneous nystagmus自发性眼球震颤spontaneous fine seam自燃煤层spontaneous evolution[医] 自然旋出spontaneous discharge自发放电spontaneous combusion自燃spontaneous imitation无意识模仿