spontaneousadj.自发的,自然的,本能的;自然产生的
spontaneous emission noise自发射噪声
spontaneous fission dating自然裂变年代测定法
spontaneous polymerization自发聚合
Spontaneous bioelectficity自发生物电活动
spontaneous transformation自发转化
spontaneous ignition point自然发火温度
spontaneous well-logging自然电位测井