clean document

例句：

1. 1. Please clean the table before we start our meal.
   在我们开始用餐之前，请先清理桌子。
2. 2. The room needs to be cleaned thoroughly after the party.
   派对结束后，房间需要彻底打扫。
3. 3. She used a cloth to clean the glass and then polished it with a soft cloth.
   她用一块布擦拭玻璃，然后用一块软布抛光。