yǔ / xū yào / tōng diàn / cái néng / chǎn shēng / cí xìng de / diàn cí tiě / bù tóng / yǒng jiǔ cí tiě / zài / duàn diàn / hòu / réng néng / bǎo chí / cí xìng

与需要通电才能产生磁性的电磁铁不同，永久磁铁在断电后仍能保持磁性。

Unlike an electromagnet, which must be powered to produce magnetism, a permanent magnet can retain its magnetism even after the power is turned off.