After all, a policeman has a number of jobs in one对于这个句子,有疑问为什么最后是in one 而非in it

问题描述:

After all, a policeman has a number of jobs in one对于这个句子,有疑问
为什么最后是in one 而非in it

用it的话是直接指代policeman,而用one是用来强调policeman作为一份工作,相当于one job.