dynamo

1. N-COUNT A dynamo is a device that uses the movement of a machine or vehicle to produce electricity. 发电机

...a bicycle with a dynamo. …一辆电动自行车。

2. N-COUNT If you describe someone as a dynamo, you mean that they are very energetic and are always busy and active. 精力旺盛的人

Myles is a human dynamo. 迈尔斯是一个精力特别旺盛的人。