磁石

Certain metals are attracted to a magnet.

某些金属受磁石吸引。

She can magnetise a theatre audience.

她能像磁石般吸引剧院观众。

Evolving process of hub dynamo which used in bicycle is presented. The performance of magnetite viz. ferrimagnetism or NdFeB is analyzed. The prospect of marketing is viewed.

摘要介绍自行车上使用式发电机演变过程，分析所用磁石，即铁氧体或钕铁能优劣，并进行市场前景展望。