a square peg (in a round hole)

US /ə skwɛr pɛɡ (ɪn ə raʊnd hoʊl)/
UK /ə skwɛr pɛɡ (ɪn ə raʊnd hoʊl)/
"a square peg (in a round hole)" picture
1.

格格不入的人, 方枘圓鑿

a person who is not suited to a particular situation or job

:
He's always felt like a square peg in a round hole in his family of artists.
在藝術家家庭中,他總是感覺自己是格格不入的人。
Trying to make him a manager is like putting a square peg in a round hole; he's much better at technical work.
讓他當經理就像是把方枘圓鑿;他更擅長技術工作。