public relation是什么?

public relation是什么? Public Relation 请问什么是public relation valuable relation是什么中文意思? 在mass media相关的讨论中,public,mass,和popular 的概念的各自侧重点是什么?Please describe the difference emphasis of the concept of the public,mass,and popular,in relation to the discussion of the mass media. “公共关系”用英语怎么说?我知道public relations是对的,但也见过public relation；还有public relationship,public relationships都对不对呢? public是什么中文意思? bmc public health 是什么杂志 PUBLIC OPINION RESEARCH AGENCY是什么? relation 和 relationship 的区别是什么?比如我现在想说 develop close relation(ship) to client representatives.这句话用relation 还是relationship呢? public public public in relation relation 词义 workplace relation public produce party翻译成中文是什么? the relation between congress and president美国总统和议会的关系是什么啊~请用英语