His hands roughened with hard work.

由于繁重的工作，他的手变得粗糙。

The boy's voice gradually roughened.

男孩的声音渐渐变粗哑了。

The storm roughened the surface of the sea.

暴风使海面不再平静。

Roughen the surface before applying the paint.

先把表面弄毛糙再涂颜料。

By sanding the split leather surface to roughen it up.

是通过打磨分割层皮革的表面，使它变粗糙而得到的。

You'd better roughen the surface before applying the paint.

你最好先把表面弄毛糙再涂颜料。

Before painting the wood, roughen the surface with sandpaper.

油漆木器前， 先用砂低把表面磨毛糙。

You will then need to roughen the surfaces to prepare them to hold the materials.

你便要他们准备表面粗糙的材料进行。