提起扫除,无非是用笤帚扫,墩布拖,抹布擦或吸尘器吸等,但是,这些方法都不同程度地存在着缺点。暂且不说最原始的扫地工具笤帚,常常是一边扫除,一边尘土飞扬,最终是尘土搬家还是不干净。即便是先进的吸尘器,吸除颗粒大的灰尘有效,对于细微的灰尘,由于吸尘的排气使它飞扬,扫除后仍将慢慢地飘落下来。所以,尽管早晨看上去把房间打扫得很清洁,待到傍晚下班后回家一看,地板等处又落下了一层细微的灰尘。灰尘的大小不一,有的可小至1微米(千分之一毫米)以下。通常肉眼看得见的灰 Lifting is nothing more than sweeping, mopping, ragging, or vacuuming. However, these methods all have drawbacks to varying degrees. Not to mention the most primitive sweeping tools, often sweeping away, dust on the fly, and eventually the dust is still moving. Even advanced vacuum cleaners are effective in removing large particles of dust, and for fine dust, it is soaring due to the vacuum of the suction dust, which will slowly fall after sweeping. So, although it looks as if the room was cleaned in the morning, it would be a good time to go home after work to see it, and a small layer of dust would have fallen on the floor. Dust varies in size, and some can be as small as 1 micron (thousandths of a millimeter) or less. Usually visible to the naked eye