fifth wheel ------ 多余的人

英文释义

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.

当我父亲把家里的生意都交给我的哥哥们时，我觉得自己是个多余的人，所以开始找别的工作。