基本解釋自發(fā)蛻變；自發(fā)衰變詞組短語短語spontaneous radioactive disintegration 自然放射蛻變spontaneous E disintegration 自發(fā)衰變spontaneous ? disintegration 自發(fā)衰變spontaneous multilevel disintegration 解躰堦段disintegration spontaneous 自發(fā)蛻變spontaneous disintegration更多詞組專業(yè)釋義物理學(xué)自發(fā)蛻變