out of one's element
原文解釋: not in a natural or comfortable situation
A. What do you think about Akihabara?
B. It's definitely an interesting place, but I felt a little out of my element
walking next to people dressed in costumes.
A. How did you feel when you first went to Egypt?
B. I felt out of my element at first because of the difference in culture,
food and language, but I adjusted after some time.