Stateman 是政治家的意思，而policeman 则是警察的意思。区别很大，可以从以下例子看出：

During election, statemans campaign in all public area, policemen are busy to make everything in order to protect everyone.选举期间，政治家在所有公共区域进行竞选活动，警察们忙着做一切以保护每个人。