dynamo
noun uk/ˈdaɪ.nə.məʊ/ us/ˈdaɪ.nə.moʊ/ dynamos
[ C ]发电机
a device that changes energy of movement into electrical energy
A dynamo on a bicycle will power a pair of lights while the wheels are going around. 自行车发电机在车轮转动时可为两盏灯提供电力。
[ C usually singular ]活力，精力
an energetic force
Onstage she is a human dynamo, spending the hour in perpetual motion. 她在舞台上总是那么精力充沛，一刻也闲不着。