magnet bar code

例句：

1. 1. The magnet attracts iron filings to it.
   磁铁吸引铁屑。
2. 2.Magnets are used in many applications, such as in the manufacturing of magnetic recording media.
   磁铁在许多应用中都有使用，例如制造磁性记录介质。
3. 3.The scientist discovered a new type of magnet that could be used for medical purposes.
   这位科学家发现了一种新型磁铁，可以用于医疗目的。