fifth wheel ------ 多餘的人
英文釋義
A person who serves no function.
例句
When my father gave all my responsiblies in our family's business to my brothers, I felt like a fifth wheel, and so I started looking for another job.
當我父親把家裏的生意都交給我的哥哥們時,我覺得自己是個多餘的人,所以開始找別的工作。