英语习语：

be in another world 精神恍惚；魂不守舍

—— Pete's really out of it these days.（Pete 这几天有点心不在焉。）
—— Yeah, I know. Ever since he met Ann, he’s been in another world.（我同意。自从他遇见Ann, 他就魂不守舍了。）

双语例句:
She just sat and stared out of the window most of the time - she seemed to be in another world.
她大部分时间只是坐在那儿两眼盯着窗外——她似乎魂不守舍。

I don't think you even heard me, did you? You're in a world of your own.
我觉得你甚至都没听到我说什么，是不是？你心不在焉。