Although the increment of the residual magnetism on the object after every cycle of magnetization-demagnetization process is very small, with the increase of the cycle index the object must be finally magnetized intensely and spontaneously.

• 虽然每次磁化一退磁过程之后物体上的剩磁增量非常微小，但随着循环次数的增加该物体最终必然被强烈地自发磁化。