该原则同样适用于侧光：侧光源离被摄主体近时，整个画面的光线衰减将比光源离主体远时更明显。
The same holds true for sidelighting: With a light close to the side of your subject, the falloff of light across the frame will be more pronounced than if the light is farther away.
在选取相似小城镇时，则是依据了模糊数学中的贴近度和择近原则进行。
Similar degree and similar selection in principle of fuzzy math are used in selection of similar towns.
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