To create the effect of hair in the wind, choose Smudge Tool. Set the brush strength on 60%.

下面我们制作风中头发的效果。使用涂抹工具笔刷，强度设置为60%。

youdao

When you are finished with the shading, use a smudge tool to smooth the surfaces. I use a hard round brush with about 40% strength!

当你结束对暗部的绘制后，要用污迹之类的笔刷来平滑表面。我用的是硬的圆形的笔刷，强度为40%。

youdao

Once the brush movement hesitates, a black mark is created, so speed, strength and agility is the essence of fine artwork.

一旦刷运动犹豫，一个黑色的标记了，所以速度，力量和敏捷性是美术作品的本质。

youdao

He tried to brush the question off with an easy joke, but even he admitted that his mobility and physical strength will be unknowns until he demonstrates otherwise.

WSJ: Derek Jeter Has No Doubt He Will Return