短語(yǔ)詞組短語(yǔ)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 返回 spontaneous disintegration