effect of smoothing

例句：

1. 1.The new paint job has a remarkable effect on the room's appearance.
   新的油漆工作对房间的外观产生了显著的影响。
2. 2.The smoothing process helps to reduce the surface roughness of the material.
   平滑处理有助于减少材料的表面粗糙度。
3. 3. The engineer used a special compound to achieve an effective smoothing effect.
   工程师使用了一种特殊的化合物来实现有效的平滑效果。