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

The surface should be smooth, no foreign impurities and injury. The finished products should be polished after the cut into the appropriate size.

试样的表面应光滑，无外来杂质及损伤。成品应经打磨后裁制成相应尺寸。

youdao

One work may not be so smooth, and may not be finished in time.

工作有时会不顺利，有时不能按时完成。

youdao

But despite dominating the game, Enyimba did not open scoring until the 87th minute, when substitute Omolade Ajibade finished off a smooth move.

BBC: SPORT | Football | African | Violence mars Enyimba victory

When construction is finished, vehicle convoy test runs will begin to ensure the smooth running of the road when needed.

BBC: A83 Rest and Be Thankful diversion route 'almost ready'