1.He has a bicycle with lights powered by a dynamo.

1.他自行车上灯由发电能源。

2.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.

2.摘要介绍自行车上使花鼓式发电演变过程，分析所磁石，即铁氧体或钕铁硼性能优劣，并进行市场前景展望。