如何使用 "roughen" 造句
- 1. These ingredients can cause bleeding under the nails , discolouration and can roughen the smooth texture of the nails .
- 这些成分可引起指甲下出血，变色，甚至使原本质地光滑的指甲变得粗糙。
- 2. Before painting the wood , roughen the surface with sandpaper .
- 油漆木器前，先用砂低把表面磨毛糙。