safe uniform?

safe uniform? safe safe safe I wear a uniform and I work to make our city a safe place.I'm a( )填个工作的单词 uniform可数? Uniform是什么意思 uniform是什么意思 Uniform是什么意思 uniform是什么意思? People's Job（根据所给情景,写一篇不少于50字的英语作文）Maybe you want be a policeman/a policewoman.You will wear a uniform.You help people live or work in a safe place. uniform为什么是a uniform而不是an uniform? uniform为什么是a uniform而不是an uniform? a uniform还是an uniform急 wear a uniform 还是wear uniform 请问 a uniform gravitational field 中的 uniform safe and safe副词