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File:Descartes magnetic field.jpg
来自维基百科,自由的百科全书
Found in articles
File:Descartes magnetic field.jpg
Description
Descartes
magnetic
field
.
jpg
English: Drawing of a
magnetic
field
by French philosopher René
Descartes
, from his Principia Philosophiae, 1644
File:NASA Science Calendar 2022.pdf
Explore Science 2022 NASA Art.
jpg