不能胜任地

例句：

1. 1. The old man is unfit for the job because of his age.
   由于年龄问题，这位老人不适合这份工作。
2. 2. The new manager has to deal with a lot of unfit people in his team.
   新经理不得不处理他团队中的许多不合适的人。
3. 3. The shoes are unfit for my size.
   这些鞋子不适合我的尺码。