当波从小扰动源向各个方向均匀传播时，其强度的变化与距离的平方成反比。
When a wave travels uniformly in all directions from a small source, the intensity varies inversely as the square of the distance.
引力大小与两物体间的质量乘积成正比，与距离的平方成反比。
Its proportional to the masses of the two objects Inversely proportion to the square of distance between them.
从各光源发出的光的强度与该光源的距离的平方成反比。
The intensity of light from any source varies inversely as the square of the distance from the source.
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