pow·er·house /ˈpaʊ(ə)rˌhaʊs/
  發電所,動力室,精力旺盛的人
  powerhouse
       n 1: a highly energetic and indefatigable person [syn: human
            dynamo, ball of fire, fireball]
       2: a team considered to be the best of its class
       3: an electrical generating station [syn: power station, power
          plant]