仍然保持选区所在，点击Ctrl + j来复制选区到一个新图层，然后在新的图层中设置表面模糊(滤镜模糊表面模糊)，参数如下。

Maintain the selection, hit Ctrl + J to make a layer via Copy and apply following Surface Blur Settings to this layer.

youdao

柔化阴影，加入高斯模糊滤镜。

Soften the shadow by adding Gaussian Blur filter.

youdao

要给他运用模糊滤镜，并拖动图层到之前一个的下方。

I will use the Blur Filter, and then I will drag the layer under the previous ones.

youdao