工作区域应保持明亮。

Work areas should be well lighted.

youdao

原来保持明亮的方法很简单，只要常常更换就可以了。

Keep the original bright method is very simple, as long as often change.

youdao

现在，添加每根羽毛的形状，外缘保持明亮，并且增加一些叠在下一根羽毛上的阴影。

Now, add some shape to each feather, keeping the outer edge bright, and add some shadow where one feather overlaps the other.

youdao