demon

1. N-COUNT A demon is an evil spirit. 魔鬼

...a woman possessed by demons. …一個被魔鬼附身的女人。

2. N-COUNT If you approve of someone because they are very skilled at what they do or because they do it energetically, you can say that they do it like a demon. 精力過人的人; 技藝出眾的人[表贊許]

She worked like a demon and expected everybody else to do the same. 她工作起來精力過人，而且希望每個人都這么做。

He is a demon organizer. 他是一位高超的組織者。