dreamer

1. N-COUNT If you describe someone as a dreamer, you mean that they spend a lot of time thinking about and planning for things that they would like to happen but which are improbable or impractical. 空想家; 不切实际的人

Far from being a dreamer, she's a level-headed pragmatist. 她是个冷静理智的实用主义者，远非一个空想家。