4、这时，我们新增一个图层，将羽化值设置为20，同样运用椭圆选框将碗的形状选择出来；
4. At this time, we add a new layer, set the feathering value to 20, and also use the elliptical marquee to select the shape of the bowl;
5、在羽化值为20的条件下将第二次选择的选框填充为红色；
5. Fill the second selected marquee with red under the condition that the feather value is 20;
调整羽化值的大小可以调整边缘的模糊程度，羽化值越小，模糊边缘的效果就越小；羽化值越大，模糊边缘的效果就越大。如下图效果所示：
Adjusting the feather value can adjust the blur degree of the edge. The smaller the feather value, the smaller the effect of the blurred edge; the larger the feather value, the greater the effect of the blurred edge. The effect is shown in the following figure:
羽化处理过的地方更自然，不会感觉有太多ps的痕迹。
Feathered areas are more natural and won't feel like there are too many ps traces.
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翻译：谷歌翻译
部分参考来自百度百科
