If you now tear up a bit of thin paper into tiny pieces and put them on the table,your electrically-charged toothbrush handle will pick them up on condition that it is held closely above the pieces of paper.

• 假使你现在把一张薄纸撕成碎片，并且它们放在桌子上，这时只要你的带电的牙刷柄靠近这些碎片，就可把它们吸起来。