dynamo

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

...a bicycle with a dynamo. …一輛電動自行車。

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. 邁爾斯是一個精力特別旺盛的人。