rubbing from stone or metal imscription

例句：

1. 1.The car was scratched by the tree when it hit it.
   汽车在撞到树时被刮伤了。
2. 2.The old clock was rubbed down with oil to keep it running smoothly.
   旧钟被油擦拭以保持其平稳运行。
3. 3. The sandpaper was rubbing against the wood to smooth it out.
   砂纸正在与木头摩擦，以使其平滑。