clean ballast pump

例句：

1. 1. Please clean the table before we eat.
   请在我们吃饭前把桌子擦干净。
2. 2. The housekeeper will clean the carpets tomorrow.
   管家明天会打扫地毯。
3. 3. After the party, I need to clean up and put everything away.
   派对结束后，我需要打扫并把所有东西收好。