I don’t have the right personality for the job. I feel like a square peg in a round hole.

我的性格不适宜做这个工作，我感觉好像一个方榫硬要插进圆孔中，很不自在。

I’ve declined the invitation to the Royal Garden Party;I’d just to be a square peg in a round hole among all those posh people.

我已谢绝参加皇家游园会的邀请,同那些显赫要人在一起,我觉得实在格格不入。