[ C ] a device that changes energy of movement into electrical energy发电机
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 ] an energetic force活力,精力
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。