为了消除这种效果，可以在闪光灯灯头上加一片不透明材料或黑色塑料泡沫板做的遮光片，以阻挡扩散的光线照射到被摄体。
To eliminate this effect, you can place a small piece of opaque material or black foam just long enough to block the direct part of the light from hitting your subject.
最常用的办法是采用不透明黑色塑料布或黑色棉布加工的遮光罩。
The most commonly used method is to use opaque black plastic sheeting or black cotton processing Hood.
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