be on another planet
US /bi ɑn əˈnʌðər ˈplænɪt/
UK /bi ɑn əˈnʌðər ˈplænɪt/
1.
心不在焉, 神游物外
to be unaware of what is happening around you, often because you are thinking about something else
:
•
He seems to be on another planet today, not paying attention to anything.
他今天似乎心不在焉，什么都没注意。
•
When I tried to talk to her, she just stared blankly, like she was on another planet.
当我试图和她说话时，她只是茫然地盯着，好像她心不在焉。