scouring powder

例句：

1. 1. She used a broom to clean the floor before she started her presentation.
   她用扫帚把地板打扫干净，然后开始她的演讲。
2. 2. The teacher asked the students to use broom powder to clean their desks after class.
   老师要求学生们课后使用扫帚粉来清洁他们的课桌。
3. 3. The cleaning lady uses broom powder to make the floors sparkle.
   清洁工使用扫帚粉让地板闪闪发光。