涡流损耗的增加不会改变衰减峰值的频率，但是会增大衰减强度。
Increasing the eddy-current losses will not change the frequency of attenuation peak, but will increase the intensity of attenuation.
时间——放射性尘降物的辐射强度衰减很快。
Time - fallout radiation loses its intensity fairly rapidly.
在无限和真空的空间中，地磁场在强度上随距离3次方而衰减。
In a infinite and empty space the geomagnetic field falls off in strength with the third power of distance.
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