Myles is a human dynamo.

迈尔斯是一个精力特别旺盛的人。

《柯林斯英汉双解大词典》

She's a human dynamo.

她是个精力充沛的人。

《牛津词典》

It may not seem like it, but even the laziest of couch potatoes is a human dynamo.

虽然听上去不可思议，但即使是那些最懒的沙发党也是一台人体发电机。

youdao

It takes some time, but it will allow you to shed a good deal of the misinformation sloshing around in your head and body currently and become a better-focused human dynamo capable of sustained achievement.

FORBES: How To Master Yourself, Your Unconscious, And The People Around You: Part 6