absent-minded
GEPT 中高級
C1adjective
likely to forget things, especially because you do not pay attention to what is happening
Sarah was so absent-minded that she left her keys in the front door and only realized it the next morning.
健忘的；心不在焉
C1adjective
characterized by being forgetful or not paying attention to one’s surroundings
While walking to work, she was so absent-minded that she almost walked into a lamppost.
迷糊的；恍惚的