基本解释自发蜕变；自发衰变词组短语短语spontaneous radioactive disintegration 自然放射蜕变spontaneous E disintegration 自发衰变spontaneous ŵ disintegration 自发衰变spontaneous multilevel disintegration 解体阶段disintegration spontaneous 自发蜕变spontaneous disintegration更多词组专业释义物理学自发蜕变