magmatic chamber

例句：

1. 1. The magnetism of the earth's magnetic field is fascinating.
   地球磁场的磁力令人着迷。
2. 2. The scientist used a magnet to attract the iron filings.
   科学家用磁铁吸引铁屑。
3. 3. Magnets are used in many applications, such as in manufacturing and electronics.
   磁铁在许多应用中都有使用，如制造业和电子学。