掸

例句：

1. 1. Please dust off the table before we start.
   请在我们开始之前把桌子掸干净。
2. 2. The teacher asked us to sweep the floor before class.
   老师要求我们在上课前把地板扫干净。
3. 3. The old books were dusty and needed to be cleaned.
   旧书都脏了，需要清理。