If something metal is magnetic, it acts like a magnet.
magnetic particles.
磁性粒子。
You use magnetic to describe something that is caused by or relates to the force of magnetism.
The electrically charged gas particles are affected by magnetic forces.
带电的气体粒子受磁力的影响。
The moon exerts a magnetic pull on the Earth's water levels.
月亮对地球的水位有磁性引力。
You use magnetic to describe tapes and other objects which have a coating of a magnetic substance and contain coded information that can be read by computers or other machines.
her magnetic-strip ID card.
她的带磁条的身份证。
If you describe something as magnetic, you mean that it is very attractive to people because it has unusual, powerful, and exciting qualities.
the magnetic effect of the prosperous American economy on would-be immigrants.
繁荣的美国经济对未来移民的吸引力。