a country, organization, or person with a lot of influence, power, or energy

Germany is an economic powerhouse. 德国是经济强国。

The university is no longer the academic powerhouse that it once was. 这所大学今非昔比，已不再是学术巨人了。

She's a powerhouse of original ideas and solutions. 她总有许多独到的见解和具有创意的点子。